MTN BLACK FRIDAY DISASTER!!!!!

I have never been this disappointed,my existing package could not be upgraded timously 11 days later.I did an upgrate on the 30th of November,it was not successful due to a system error.However,on the 3rd Dec a lady from retensions assisted me on the phone but the order was still not done by the 14th December.My SIM cards where not shipped on time and the billing date approached before the order could be completed.The store advised that retentions drop the order so they can try assist me.My problem is the billing date,now I will be billed on a month to month instead of R499 sky silver contract. It took more than 10 days just to sort out an existing contract. I still do not have my SIM cards!!