UNHELPFUL SERVICE

My iPhone 6 screen kept freezing as of November 2015.Took it for repairs twice & the issue persists, works properly for a day or 2 then reboot story. Saturday 16 January I returned to Cresta, after I had sent the store manager an email informing him of the ongoing issue, he never responded, I called and was told to bring the phone in. He assured me I would be updated/copied in every email communication regarding the next steps.NO UPDATES.Tuesday I called, was told I will be an email will follow, today I call no change in the status of the escalation, to make matters worse when I asked Leon Fanagan why I had to be the one calling in to check, he tells me because there is nothing to update me on.WIth a sarcastic tone I'm also told I'll be phoned 4 times a day even if there is no update. I pay for this service, a phone that has been unusable in the last two months. VERY FRUSTRATED with the lack of communication nor an indication of a resolution hereon. I have been a contract customer with Vodacom for at least 6 years now, with more than one Contract. This matter clearly seems TOO difficult to be resolved. UNACCEPTABLE ATTITUDE from a STORE MANGER. I have been very patient enough!!!