this company is crazy they jus keep trying to go up on my bill sneaking bills on my account i been overcharged more than i can count i dont have home wifi but still getting charged

this company is crazy they jus keep trying to go up on my bill sneaking bills on my account i been overcharged more than i can count i dont have home wifi but still getting charged and I had price lock paying over 3 for this phone since it came out and I’m still not done payin it off smh 4k for a phone worth 800 is crazy