How Can I reach out to a manager or supervisor who can help resolve my billing issue and internet service issue?

Hello,

I have been trying to reach out to a manager/supervisor who can help with my billing and also the service I have been provided. I didn’t expect this kind of behavior and service from xfinity where all they care about is taking money from customer and not the service. I had called back in Dec 9th of 2022 when my contract ended for internet to renew it for same price as I had been paying for from last year. The representative said he cannot give me same speed (800mbps) for same price of $50. So he said he can provide 1GBPS for same price of $50 since its in promotion but i said no I know its more speed but would like to stick with 800 if possible but he said only way I can get $50 is if i go with 1GBPS. So i was like ok but I confirmed with him like three time that if we upgrade to 1GB plan my bill still would be $50 and he said yes. So we proceed with agreement and when he send the document to sign it said $65 for 1GB plan so I stopped and asked him again that it should be $50 and not $65 he was like oh don’t worry that just for paper work and because the promotion is like that and try to cover up for the lie he was telling me. So he promised me that dont worry that says $65 but you will only get billed for $50. Trusting the customer service and xfinity I complete the agreement. Now following month I get billed for $62 so i was like maybe because of  prorated charges from last month as I called service late so i was like maybe it was the extra time when my new plan didn’t start so I didn’t question. Now I get Jan 2023 bill I see i got charged $65 called the company and rep said it shows $65 and told me they have raised it to manager and would call me in next couple days. Went by a week no call. I called again and another representative provided me $15 credit for that month while they investigated the issue and get a manager to look into it and call me withing couple days again. It was two weeks and more now and no one called. Now I get my Feb 2023 bill of $65 again and I called the representative said the agreement if for $65 and would have to see a manager. They said manager is not available will call back 2-3 days. I have called like 4-5 time to fix my bill for what i was promised and now all i get after talking to someone everytime for 30min - 1hr that manager is not available and will call back and never get call back. Not just this I have a 1GB plan and the max speed I get is 400mbps even though I have Netgear cable modem router which can handle speed more than 1GB. Also, since 6 days my internet speed is really slow to intermittent connectivity where max speed i get is 30 mbps it lower than what I have gotten so far. I check my routerlogin admin setting and its says poor connection. i check all the cable within house and they are all fine like they have been the same since two years ago the tech installed it. So i called to ask them to send a tech to check the outside and they are like we have to charge you $100 like for what. It not an issue inside the house and when i called on Monday the rep said the issue was in xfinity side they are working on fixing it and today is Saturday its 6th day and here I am still wiating for the issue to be fixed from their end. When i call to get a tech they said they would have to charge me $100. I asked for manager and was hold for 30 min and they said manager would called back in 30min. It’s been 1 hr since then and still no call back. I am waiting for 1-2 days if I don’t get my billing issue resolved and internet speed fixed planning to cancel my and other family friend service here at xfinity and move to att or tmobile. This is not what I had expected from xfinity.