Baf srrvice from sp

Good day.Im a regesteted pirb and read seal plumber i reported a wsrraty on a new geyset this morning sp came out and after a bunch full of excuses i chssed hom awsy and replaced element myself acoording to them im nog allowed to ude a kwikot driptray witch is approbed by sabs im nog allowed to use a 400 kPa prv on a balanced system i just fid a follow up on the law on geyset instalations and thete is absolutelh no incompliance defect on instalation ill nevet in my live by heatech again ill by the oppiste kwikot in the future