Disgusting customer service

I am appalled by the level of incompitence and unproffesional standards of the Game store. I handed in an item (Trolley Speaker) to the store for repairs in March 2019. After not recieving feedback for a long time, I made a follow-up in March 2019, I was then informed that I have not submitted the document (a slip) for the speaker to get booked for a repair. Nothing would have been done about my speaker if I had not done the follow-up. After putting my frustrations aside, I submitted all the relevant documents on 03/05/2019. I have not recieved my speaker back till this day. I call the store regularly and keep getting the same excuse, "we are waiting for the parts to fix your speaker" and they promise to call me back, and they never do. I am disgusted with Game's service