I was de*****ed under false pretenses & they refused to pay ne back

My car was booked in for repairs on 2/11/17, they said repairs will be complete on 16/11/17. On 13/11/17 i was sent an sms stating that the repairs were "complete" due to personal reasons i could take collection of the car on the said date, i was then charged a storage fee on the basis that I didn't collect the car 3 days after completion. I collected the car on 25/11/17 & paid the R1600 storage fee charged, upon reaching my residence i realised that the repairs weren't complete & nobody picked this up, i then sent an email on Sunday to which nobody responded (they were closed), by midday Monday they still hadn't responded so i drove there, they then told me that they hadn't picked up that the badge was missing & that they have ordered one, i then asked them to pay me back the R1600 as i was incorrectly charged as i was charged on the basis that the car wasn't picked up 3days after completion but repairs to the car are still not complete (they just called me yesterday to ask me to bring back the car as the badge has arrived) but they are refusing to pay me back the money. So I don't know if this is how they operating by falsifying information to **** people but i am very disappointed and will take legal action if i an not refunded my R1600.