Worst service ever !!!

I'm been a customer for many years .. while trying to upgrade my contract .. I was informed that I could not process the up grade due a block placed by cci sales department / call centre .. the mtn Phoenix branch assisted by contacting the 808 contact number .. the agents had no idea what they were doing and worst of all the service we received from the tead leader Nadia Ali was beyond disgusting .. she was not willing to assist and gave us a lot of attitude .. We were transferred from one department to another and to date I have not been assisted .. as a customer I should be given the option to upgrade at a branch or via the contact centre ... I've been told I could not upgrade at the branch due to the block is not on !! Mtn contact centre is the worst ever they could not assist with removing the block which was places by their sales department or assist with the query in general.. !!!