Bad Service

After going to the Menlyn Samsung Store we were referred to the Samsung branch at The Grove for repairs. We had a cracked screen Our phone is still under guarantee and we went there with the invoice, etc. When we arrived there the customer service consultant said they need the original invoice with the IMEI code on it. That was although we had the invoice with us. So we thought there might be another issue, so we went to the MTN shop at the Grove. The MTN shop told us that the invoice that we had, was correct and they had to accept it. They sent us back to the MTN shop three times. After that we insisted that we had the correct invoice. They eventually saw their mistake and booked the phone in. That was on the 9th of September. They said it would take 5-7 working days. After 10 days it was still not fixed, due to a part on back order. After they promised to phone us as soon as the phone was repaired, that never happened. On Tuesday 10th of October I once again phoned the repair center. Apparently it was fixed on the 29th of September. It is 20 days after it was booked in!!! Surely that is not acceptable. Secondly why does Samsung not have a notification system informing a client when the job is completed. We stay 100 km from Pretoria and it needs special arrangements to go there. I am very frustrated and annoyed with the service received.