Overpriced and bad workmanship

I went to Intercare Tygervalley Dentistry for a chipped tooth. Went in, no local anaesthetic was needed, received a tooth filling and out in 10min. I got slapped with a bill of R2072.10 and I now suffer from severe sensitivity around that tooth. Only reason I went there was because my normal dentist was in hospital. A filling like that would normally cost me between R500 to R800. I'd advise anyone that goes there to get a full quote beforehand, learn from my mistake.