Mtn service pathetic

I have a contract with mtn since 8 years. When i called for an early upgrade, they tell me this is my first cycle and i cannot upgrade. No one can assist. When asked for a supervisor, they put me on hold for 30 min and no one on the line. I pay my accounts on time and have never had a problem with debit orders. My previous Samsung S5 was taken out with them 6 years back now suddenly this is the first time i have a contract with them. Highly disappointed. I will cancel my contracts with them when due and move over to another network provider. #disappointedcustomer