MTN POOR SERVICE

Took out a new contract that is advertised with a takeAlot voucher. Despite sending the invoice, no voucher received. Visited the Grove Mall MTN where I was told they dont know about the voucher I should go to Menlyn where I took out the contract. I asked if they could phone Menlyn and ask but it was clear they did not want to help me as I was assisted whilst standing outside the door while the salesperson is shouting from inside with the door slightly open. There was only 2 people in the store at that time and 2 Employees.