MTN bad service

I started my claim process on the 6 of January 20 and even today I still haven't not received my replacement device they keep on saying that they waiting for a tracking number from the supplier and I was told that once a purchase order has been created it takes 3-5 working days and it has passed that.And I got an SMS last Fri saying that a purchase order has been created but till today nothing and I have sent emails and called to find out what's the hold up but nothing. I have to call two or three times a day for finding out what's the feedback. I'm very disappointed with the way the whole process has been handled.