Do credit controllers actually exist?

<p>Fed up :(</p> <p>I took out a fourth contrat 10 days ago - really bad idea :(</p> <p>The contract was approved by the credit bureau at your request. However, MTN has not yet managed to increase it's internal limit to more than the cost of the four contracts. This is apparently the job of the elusive 'credit controllers' :(</p> <p>I have had all my lines blocked twice. I have called customer services on four seperate occasions and popped into the store three times.</p> <p>My fourth contract is yet to work.</p> <p>How difficult is it to change an internal MTN limit?</p> <p>I've had more than enough now :(</p>