Be aware of plumber called CJ who uses the name Plumbing Guru or Plumbing Doctor!!!

I contacted this business to assist me with a blocked drain. I spoke to CJ on number ********** who told me the cost would be between R450- 650. His workers arrived on Saturday 17 February 2018 at 12h30 and was ready to leave again at 12h42. He then sent me an invoice for R 500. I contacted him on Monday 19 February 2018 to inform him that the drain is still blocked. He told me that he would sent his workers to come and check. It is now Monday 26 February 2018 and he has chosen not to take my calls. I find it unacceptable that this business person is quick to demad payment but he does not accept responsibility for sub standard work.