Beware on Internet price transfering to a business account not happy

I have a business phone plan and a TMobile internet line on a different account. I had the bright idea to call and combine both accounts so I would have one bill. They had transfered the line and everything. At the end she tells me its $65 for the interest because it is now a business line. I said I did not want it transfered if it was going to cost that much. I wanted the same price of $50. She said she would help me out and do $10 bill credits. 3 months in I realized I didn't get my credit. They would not give me the monthly credit and would only do a one time courtesy $10 credit. They also said I was getting a $5 auto pay discount which is making it $60. I just want the price I was paying back to $50!! So frustrated I was on the phone for 2 hours and got no where.  I am paying $120 more a year for this interne that is the same as the residential. I am going to cancel this internet line and have my hubby sign up at the $50 price. I am seriously pissed they weren't upfront with me with the new pricing. Not once did they mention it was going to increase until after the transfer.