Bad service delivery game extended warranty

Bad service delivery on extended warranty refusing to fix Russell Hobbs dishwasher for three weeks. Customer game at game refusing to assist phone on hold constantly. Referred me to svc electronics person at reception was very rude and abrupt refusing to answer phone after numerous calls says part for dishwasher was delivered but claims still awaiting another part although has discussed last week he was waiting for only part. Back and forth between game and svc electronics what should I do now