Pathetic Service

I moved from 4G to 5G in December 2020 and was informed that they could not upgrade my account I would have to open a new account, but they would cancel the 4G end of December. Todate they have not cancelled the 4G and continue to bill me for it. I have emailed and called numerous occasions with absolutely NO feedback! They clearly have no concept of customer service. It is all about new products and collecting money.