Unhappy Client

My alarm is not functioning properly. I booked for a technician to come check what the problem is and I was give a date of 31/07/2024. I waited the whole day and no one came and the was no communication from them. Today they call me to say they are 25 minutes away when I tell them that I'm not at home it was like I was the crazy on. Secondly, on the 20th of June I paid R600 to their account and they also debited R850 and the sales lady said she will forward the proof of payment to the creditors department so that in July they debit R250 instead of R850 however that was not the case they debited R850. I have been calling to make a follow up on when I will get my refund but unfortunately the creditors line is always busy and I never get a call back from them. Yesterday I sent an email and still no response. I am very unhappy with their service, they're quick to debit but they do not give answers when one needs them