Xfinity Mobile sold us at one price started charging double

In June 2019 our family changed from Verizon to Xfinity Mobile to save money. We transferred all 3 lines and purchased 3 NEW phones. During our transaction, the salesman offered us an iPad for only $10/month and said there would be no additional costs if we didn't use data. This worked out for us as we knew our kids would only be using it at home on our wifi. After only six months the company decided to start charging for data, EVEN IF YOU DON'T USE IT! This made our $10/month payment for the iPad to over twice the amount at $22/month.

We don't even have the option to give back the iPad. I believe it is unfair to charge for a service we don't use. If we use it, by all means, bill us. I have called multiple times and spent more than 8 hours on the phone trying to get this resolved. Most people were polite but the last manager, Patrick was very rude and condescending. He told me that his supervisor would call me back on Monday, I was talking to him on a Friday.

It has been 10 days and I have not received ANY calls. We left a company we were with for 10 years, who never charged us for services we didn't use, to save money, and started getting scammed just 6 months after being the Xfinity.