Bad service

My iphone 6 plus was send in a month ago for water damage repairs. We have a insurance with vodacom and we reported it. Sms was send that the phone is fixed and ready for collection but when we arrived at vodacom menlyn the old phone was given back and nothing was done because they forgot to mention what was wrong with the phone and what they were supposed ti check.They will send the phone in again and we will wait for another 3 weeks.We phone vodacom call centre and they say they will call back within 48 hrs we are still waiting it is now 5 weeks. But we pay them on time and follow their advice. They are a disappointment and not relaible