weFix can't fix but can charge

On 4/3/19 I took my iPad to weFix Garden Route Mall to replace the battery. They said it would take no longer than 72 hours. On 12/3, I went to the shop to find out re progress, only to be told they are still waiting for parts. The manager promised me it would be ready today. Today 14/3, 10 days later, I went to pick it up, but the same excuse. I told them I wanted it back, as they could not commit to a date. They said I had to pay R179 for the repair assessment even though I didn't ask for an assessment, the instruction was to replace the battery. They told me their technician had taken it apart and had to reassemble but couldn't replace the battery as it was swollen! My iPad was in working condition when I handed it in but after I collected it, it was unusable until I replace the battery. I paid in cash and when I asked for a receipt, they said they would email to me. I then told them I had no faith in them and insisted on the receipt.