Attempting to open a new account

It seems that none of the call centre agents are able to assist, when I went to the shop they would not allow me a new contract due to me having a contract 3 years ago where I only acquired a R100, limit they refuse to assist in opening a new contract as I do not qualify for any amount higher. I have spoken to 5 call centre agents where all of them would like to keep transferring me to the next person as I do not have an existing contract. I am trying to get their accounts department to increase my limit but none of the agents seem to want to assist, the last agent told me to go to the shop again and they will know what to do, but when I went there last week they didnt know. How am I supposed to resolve the issue if nobody knows how to assist in increasing the limit that they have on the system, and blaming trans union is not an option. Transunion cannot advise companies how much credit they can give the customer, they can only provide information so that the company makes their own judgement call.