Opel Umhlanga and Opel France EXTREMELY POOR SERVICE!!!!

Actually this should be a minus rating. I took my car into Open Umhlanga on the 5 December 2022 as the engine warning light came on. It took them almost 2 days to get the results from diagnostics It took them another 3 days to let me have the report. The insurance company approved the claim after requesting the report from them. Opel then ordered the part on the 14th December after 2 weeks of back and forth. Today only they tell me that the manufacture in France has not yet invoiced them and only after receipt of the invoice and payment will estimated time of arrival be 21 days thereafter. I am from Johannesburg and was only holiday in Durban when this happened. I cannot get home to work as I am stuck here. I am will now have to take unpaid leave until the part arrives perhaps 21days from now and then add on days to repair. I was told I will be given a courtesy vehicle and therafter told I needed to pay R2200 fuel levy. I did not budget for this. I was then told this is not their problem! I am 60 years old and have been a loyal customer to Opel. This being my 2nd Opel. THIS IS REAL SHODDY SERVICE TO A LOYAL CUSTOMER. They tell me they can't do anything about it as it is now with France!!!