bad service

i was having a problem with my new phone which i had only received in the beginning of May. i took it to mtn and asked for a replacement as it had not been 3 months. They said they could not give me a replacement it had to go for assessment which takes 7 working days. So i booked it in. Not counting the weekends and the public holiday, 7 days was on Tuesday. I had not heard a word from anyone so i phoned. The phone was only collected on Friday the 7th August and i booked it in on the 1st August. The repairs department apparently received the phone but up to this last Friday the 14th no one could give me an update because the phone had not been booked in. i then went to the store yesterday and the bad service continued. i was not advised in the first place that it would take 7 days to get to the repairs department which is in Durban. i eventually got an answer that my phone was being replaced, but they think it will be in the store on Friday. That is 3 weeks not 7 days. It is not easy to find a mtn store that is helpful.