Someone has hacked my phone and is sending unidentified information almost daily to several unknown numbers without my premission. What can I do to stop this immediately?

T-Mobile does not do anything about hacked phones. I got a second one to see if that would help but they gained accessed to everything. anti-virus's don't help and neither does calling local law enforcement. I will tell you also that resetting doesn't work because they already have all your information. I am on my third phone 4th sim. And the people that are doing this live right next door. Cops wont do anything. All they could tell me was to go to the repair corporates store. I didn't go because by then I had already spoken with 6 reps and had been to 3 stores. Any thoughts