Removal from credit bureau's

If I could give them a - 0 I definitely would. They terrible, I took out a contract for a iPhone with them more then 6 years ago. It's been now more then four years that my account has been paided up and I have been struggling to get them to remove from my credit score for four years now I even went to teg stores to assist. They phone in the I get transferred to speak to other agents. Then the calls get cut on me not just once.i get told it was sent already to be removed. Others claim they will send it and take my information and will always e. I am still waiting. This is affecting me negatively and they don't give a damn. Others tell me yea I can see you paid up along time. I really need to get this remove and don't know what to do now. And mind you. I used my phone for 2 months only. It fell in the water had full cover and forgot which over I took out,so I went to the stores and ask them to check my cover the guy **** and said it wasn't the full cover. I took my phone to the Pakistan just for my sister to remind me we took the same cover I can check hers. Went back to ask why he **** and the guy all of a sudden no longer worked there. Call centre said no they can't cover now cause the phoned was open. Lost all that money because of staff that refused to assist had to buy a new phone.....