Nothing to do with cookers, but we have recently had a problem with our electric shower (Triton). It was installed twenty years ago and we have only had one problem with a part during that time, which Triton replaced (call out charge of £60 something which included the part). Anyway, DH contacted them on the web, call out charge now £99 (I think), but with the proviso that if they didn't have the spare part the money would be refunded. Anyway, engineer came on Tuesday, two parts had given up the ghost (not surprising after 20 years), they could replace one but not the other. The engineer said we would receive a call the next day (we did), Triton proposed a new shower, with a competitive price which DH checked, and would install it for the cost of the original call out charge. The new shower fittings etc will be so that we do not need to replace tiles. Email that night to say shower would be delivered the following day - it was here by 9.00 am, and a convenient date has been arranged for the fitting. How is that for service?
So, yes, it is possible to get things repaired ... and sometimes you just have to give up.