T-mobile charging me after cancellation

I am also disappointed with T-Mobile! I got wifi hotspot and data only plan, $55 plan, ordered it on the 8th of Oct, received it on the 12th and activated it on the 13th, device showed service end date of 11-12-21, called cust service on 11-8-21, said they reconnected me for 24 hours, since I couldn't make payment at that time, then they charged me for it twice! I checked the account online on 11-18-21, and now bill showed amount due of $165.00! Customer service told me the due date of the bill is not the same as the service date, the due date started the day the order was placed, cheating me out of 6 days of service, I thought it was a prepaid account, very misleading on the website, they charged me late fees and suspended account fees, long story short, I had the device for a month and 5 days and they charge me $165.00?!!! I could have had satellite internet cheaper than that! I will not be recommending to anybody to use T-mobile.