I purchased a Rengora Dishwasher for a property in London in October 2018. The reason I selected Rengora over the £100 cheaper Lagan Dishwasher, was to get the five year guarantee (Lagan has only a 2-year guarantee).
Over New Year the dishwasher broke down. With considerable difficulty I contacted IKEA who eventually gave me the name of the relevant repair company, which I eventually successfully contacted on the first working day after New Year, January 4th. An appointment was made for an engineer to call on January 10, but this was later postponed until January 17 (the reason given was illness/ isolating).
Because of the delay I paid a local appliance repair company over £140 to attend, in the hope that the issue could be resolved more quickly. This proved fruitless because it turns out that parts may be needed, and by the time these are ordered, delivered & fitted, it would be cheaper and quicker to buy a new dishwasher! So we continue to await the IKEA guarantee company visit, whom I have contacted more than once, in the hope that they could bring forward the visit and / or at least come armed with appropriate spare parts to carry out the repair in the course of their first visit.
So some 17 days and counting since the dishwasher first developed the fault we will have the first visit under the guarantee, which may /may not resolve the problem - not to mention the £140+ wasted on the local engineer.
So my advice is be wary of paying extra at IKEA for guarantees that do not deliver, & shame on IKEA in these waste averse times for making it more convenient & more cost-effective to buy cheap & discard.