Rims NOT REPAIRED

I took my Merc SLS rims to these guys over two months. My rims we not repaired to. Only saw that rims were not repaired when i took them for tyre fitment. Took them back over a month ago. They keep telling me stories of how they cant get a spare rim meanwhile theyve been paid. I was told 'll have to pay R500 extra or more to get it repaired again whereas I paid them R2800 before.I told her i wont pay it ,why was i being charged R2800 im tbr 1st place? Why should I pay extra for their incompetence?I hate bullying tactics!!!!!!!I wouldn't advice any of my mates or colleagues to use these guys .They just wanna take our money and make our requests to look unreasonable. Wht do you have a Repair signage? Mag Repair and Sales,144 Stormvoel Road,East Lynne. !!!!!!!