MERCEDES TERRIBLE SERVICE

Owner of a mercedes benz glc, beware if you are purchasing one as Mercedes bENZ DOES NOT have spares in stock, I ordered the parts 3 weeks ago and spoke to the manager at Cargo m2 city and was promised the parts on the 31st July, only to find out today that I must still wait another week or more for the parts as it is not here from germany, I am currently using a hired car and this is costing me unneccasary money. we called mercedes benz customer care head office and they say they will take 4 days to get back to me to solve the problem. This service is unacceptable from a so called reputable company.