Summer Mobile. If they call, don't use them! 4 months later contract has not been sorted out (MTN)

Summer Mobile contacted me for my MTN upgrade. When i received my 1st notification regarding my monthly minutes it was wrong. I called and asked them to change it which they did but to the incorrect contract. An email was sent by Lerato at the MTN Northgate branch with specific instruction and still they get it wrong. They then proceeded to tell me that i must call MTN and sort it out when they made the mistake. After which i did and MTN told me that only summer mobile can do this not them. The back and forth has been frustrating to say the least. Management and senior management has been emailed at summer mobile and still my changes have not been made. I am very disappointed at the service and will never use them again.