Worse service and customer abuse

The utmost worst customer service I received in my life. Had my screen protector placed on there and after two attempts they said they going to refund me. The guy just took my card and handed me a slip. I had go back to ask when I will receive the funds. Only at that point he said it will take a few days. When telling him that he should have explained that before hand he said he does not have time for this. When calling the regional manager which is their complaint process I had to wait 10 minutes for him to then shout at me saying i got my refund and there is nothing he can do. They removed the protection I had on my phone before I came to the store as well. Leaving me in an even worse condition and being shouted at with no apology.