Car is in repair shop, spare part is not in stock, loss of earnings

Moin Moin, I left my Ford Focus last night at the Ford contract workshop and threw in the key. Date was set for Friday. Actually wanted to pick up the car until max 1 p.m., because I need it for work at 13.30 (deliver packages). The aggregate belt should be checked/checked, because it made squeaking noises in cold condition. At 11 a.m. the workshop calls me and says the belt and a tensioning roll must be changed. emen is already starting. Cost point 300 €. I give it ok and he says he will make it by 1 pm. 10min later I will be called again and I am told that the spare part is not in stock. Would only be there by Tuesday at the latest. I think great. I would have had a tour on Friday, Saturday and Monday. Altogether I lost almost 300 €. So I wanted to have a rental car. But that also only for 20 €/day and with 50 free kilometers. That doesn’t bring me anything. Our. At the prices I drive for free. Had actually hoped that I could get the replacement car at least for free but then Pustekuchen. Why take off the belts if you don’t have the spare part in stock at all to carry out the repair? He wouldn’t recommend straps on it again or only under exclusion of warranty if something happens then. So 300 € lost earnings and 300 € for the repair does 600 € damage. Do you find that so ok or how would you have I was the first customer there, so the car was always on Ford’s service before.