********** account

About two years ago a ********** account was opened using my details. this matter was resolved with vodacom. I'm currently in the process of applying for a contract with a cellphone provider. the issue is that the cellphone provider picked up an overdue amount that is of the ********** account and cannot process the application until vodacom gives me a letter in writing stating that the are no overdue amounts. I've spoken to about seven people who either don't know what they are supposed to do or promise to give me the letter and then keep quiet. this is the third day that i have been calling to check on progress and every time i call i get a different consultant who tells me something different to what the previous consultant had said. as i write this one of the telephone just hung on me. this shows that these people are rude and ***********. please assist