Tmobile will not answer my calls

After I upgraded my phone last November with promo to receive 800$ credit My bill has not been the same since. Tmobile took my phone entered me into a contract I did not approve of nor did I sign or initial. I have visit stores, numerous calls to customer service with very little help. My recent call I got a tech that use to be in billing, he figured it out and it seemed correct. All of the sudden I get a bill where my phone jumped $15 my home wifi jumped $20 this is per month, my wifi was billed 2 times @ $55  I have not been able to connect with customer service since. I have records of calls placed and holding well over 1.5 hours each call without speaking to anyone. I’m currently on hold 48:52 minutes.

Only way to get them to answer is request a new phone, then ‘sales’ transfers me to the same on hold nightmare.

I see this everywhere online and currently looking for a class action to join!