Fed up

To whom it may concern. I've bought an Huawei P8 lite at this shop, accidentally got some water damage into the phone. But non the less, booked it in for repairs, got the phone back after 3weeks. Got told the phone is fixed, went to pick up my phone(battery flat). Was told by the technician if the phone doesn't work or give further problems that I must bring it back so they can refund me. Paid R850 for the repair. Took the phone home charged it, only to find out that the touch screen doesn't work, took it back to the shop for my refund only to be told that they need to do another assessment on the repair they didn't repair the first time. Was told the assessment gonna take 7 working days, and the will phone me thereafter. Its now day 10 never got phoned. With the first repair I had to phone or visit the store to get any updates. This is totally bad customer service.