Taking a week to solve a billing problem

I have been a customer for 20 years.  Since several years ago we have had to contact customer service or go to a store to "review and renew" our 1 year contract.  This time I logged into the account and saw a promotional offer (for me) for 500mb internet for $25mo/1 year (with $10 autopay and paperless - I have the screen shot to prove it).  When I added it, my total bill was going to be  over $50+ instead of going down (later I realized that maybe I had to remove the previous service), before I confirmed/agreed I contacted customer service.   The agent could not "see" the price, of course.  She claimed it might be for new customers but I confirmed that it was in my page and was offered after signing into my account and "reviewing" my plan.  After a while she offered a "deal" for 300mb that after the credits (customer credit, bundle credit, etc) was going to come up to close what I was expecting to pay  (around $5 more monthly for slower speed) but at that point I just wanted to get this done.  She sent me a "contract" to agree, it was $10 more than quoted and when I raised the issue she said that it was going to come down after I singed to auto pay (which I am already enrolled).   To add to the frustration, the next morning we had no internet at all!  I contacted customer service once again and after loosing half of my day (between calls and going to an Xfinity store), I got the issue solved.  I did not review my "new plan/contract" because I thought it was a done deal, the rep mentioned my monthly bill and it was aligned with what I thought it was (unfortunately I did not ask for a print out) .  I was mistaken... yesterday after I signed into my account to check what my next bill will be, it was different (higher) to what I agreed.  I then realized that there are 3 new contracts in my account all for the exact same services with 3 different prices, the next higher than the previous, all from the same day.  That comes to my latest call to customer service billing department (yesterday) after trying several times to contact them via chat  (which I prefer because I screenshot the interactions).  After over an hour of "let me fix this for you" and "you will get the lowest price in the contract"  "please be patient I am working on it" the phone call ended with the rep offering to continue working with the finance department and assuring me that he will call next week at scheduled time.   Now I ask,  why would it take 1 whole week for Comcast to fix this issue?  I was given no ticket number, just the promise to a call back in a week.   One of the previous agents I talked to about the internet issue offered me a credit for the inconvenience and lack of service, that was never credited.  I pointed it to the last agent and that was the only thing that got taken care of/ was accomplished  during a 1 hr+ call.  In 20 years I never had to wait a week for a billing problem to get solved.   I was very open to even accepted a lower speed for a higher price just to be done with this (in the past Comcast has improved the speed as courtesy so I figured I will save my time and did not want to haggle anymore).  But again 1 week to solve a billing issue from Comcast end?  In the meantime I will be charged for the higher prices for a week, I guess I will have to ask for an additional credit during the next call to balance things off.   Now I ask you, who pays for all the hours of your time waisted  to deal with all these issues?  I just wanted to put this in written in case I never receive the call next week.  I have screen shots and pictures of the prices offered and the chat interactions (where I was assured I will get the price in the contract plus $10 less). I understand the phone calls are recorded for future reference.  Maybe someone here can help to expedite the resolution so I don't have to wait a week.