Deposit and repairs

I lodged a complaint about a water pipe that went , I paid R1500 out of my own pocket , after lodging the complain someone called me and said they would assist with a refund and send me an e-mail to send the invoice to , still waiting for that e-mail - then before I bought the car there were some repairs to do , they asked for a R5000 deposit before starting with the repairs and I was told that I will get it back same day that I take delivery , I took delivery and needed to send a copy of my ID and proof of bank - I did this last week Wednesday already , still waiting for that refund and now I've been told i could wait another 4 to 5 days ????so its fine for them to ask for the money to start repairs immediately but when I want it back then its ok to take your time ? on top of that as part of the repairs that was done the person who replaced the shocks never tightened the tire rod end and it come lose , if that happened on the highway I would of rolled the car and lost my life possible - when does the headache stop ?