Blacklisted for an Unknown Accaount

I have never taken a contract with them and boom after two years they send me a bill to pay because account has been in areas for long and they hended the account to Legal which they have black listed me and my credit score is ruined now. They did all that without checking their facts and someone used my id to optain / trike the deal with Mix telematix and they did the scoring using my id instead of the person who took the contract. when they realised that person is not paying the account then they used me to black list and i have called them up and managed to get to the bottom of the problem. The contract was regarded as nil and void and it was canelled with emmidiate effect but the forgot to claer my name with credit beraoux and the letter of good standing was issued on my behalf. Up untill yesterday i app**** for a loan wanted to get money to do something urgent only to find out that i was declined because of Mix Telematix - Blacklisted now i am stuck, the ir legal department promised me to clear my name within five days and i am running out of patient here where am i going to get a loan with that record i would want them to give me a loan themselves or i am going to the police to lodged a ***** case as i am now begging them to sort this problem for me. I am So Puzzled how come they do something like that with onother person's identity number and going ahead and issue the contract ******** and if its not sorted out this week i will be in their office demanding the loan that i wanted from the creditors and coming with police to help me with this matter