BAD SERVICE

My car has been with renew-it rivonia since January 2023. I have been told by them that the reason is due to a delay in parts from Merc. Which has also been somewhat confirmed by Merc. My problem, is that I constantly have to call them on a weekly basis to receive an update. I phoned last week and spoke to Nikita who promised to find out what the latest update is but she has not called me back. I have been phoning on a daily basis since then and I can never get through to her and I leave countless of messages with reception but NO ONE ever calls me back. What is so difficult about phoning me back? Whether the news is good or bad... the silence is ****ing me off. COMMUNICATE!!!!!!!! It's not that difficult.