Boost Mobile review: Service and unauthorized uses of information

I went to a boost store located in Olathe Kansas just to get 1 phone only. I was quoted 1 price then the price gradually continue to change when refused offer and prices someone else took over and continued and then gives me this outrageous quote when I then quoted the prices that I was originally quoted the sales guy became upset because I wouldn't pay the $500+ I then explained to him that was wasn't our agreement so they tried to sell me 4 phones with 4 lines I told them I didn't need all that so I was told to pay 90.00 so I did he then said he would keep 2 phones and I could have the other 2 phones so I left from that on he the sales guy continued to harass me for 500.00 I told him that was not our agreement and I was not paying him for something I did not asked for plus he wanted me to pay him for 4 phones/lines I did not have. Then he proceeded to go into m y account and being changing my pin codes my phone numbers email account. I called boost immediately and informed them of the problem they assisted me into changing my information informing me he would not be able to do it again and that he should have not been able to do that. The following day he done it again along with disabling both of the phones I have called boost 8 different times trying to get help to no avail no one was able to assist me I then physically went into 3 boost mobile stores and again no one could help me prevent this guy from going into my account changing everything without my permission or consent to now disabling me from using the phones I have not even had the account or phones 1 month my billing due date is not till the 22nd of the month