Misinformation and unresolved issues

I am 67 yrs old living on ssa and snap and lifeline. I didn't owe on monthly cellphone service. The government provided me with free cell service and phone. My bill with Xfinity was $111.00. In late June Xfinity sends a notice My box needs upgrading so I call. The agent handled everything telling me a return ups label would be provided(it was not). Then she proceeds to inform me that "with Xfinity Mobile my Cable bill would only be $113.00 if I switched my lifeline service from what I already had and I WOULD NOT have a monthly cell phone bill". Trustingly, I switched.  Now my Cable bill with Xfinity is 176.00 and Mobile is $60.00. I had to call and call trying to get out of mobile auto payments which their system generated on the 1st and now I'm overdrawn because my check doesn't come on the 3rd.  There were a lot of things not told to me back in June and as a long time customer I really feel hurt and short-changed. To go from $112.00 monthly, to $176.00("ma'am u must get the internet first to have Xfinity Mobile") is disheartening and, I am tired of calling, being told, "noworriesma"am... sorry okhaveaniceday.....nothing I can do....etc. " I wish I could go back before latter June. I am not satisfied. I sill haven't received this $200.00 prepaid card.....wow how can a big business do just bad business?