Bad service

I'm so disappointed with bmw Montana service , on the 24 November 21 my car was towed to bmw ,2 days later received an invoice after my car was diagnosed, accepted the invoice and made a payment. 1 dec went to collect my car while driving I noticed thsy my car is not locked ( passenger door) stopped at the nearby petrol station checked my car and found that it cannot lock. I called Bmw Agent Goodwill to inform him of the matter even took a video that only my door can lock , he then advise me to lock it manually at that time.

Now I must also manually open it .

Since them been trying to call him to no avail, send whatsapp messages no response.

I am not safe at all ,Tell me how will on earth everytime remember that I must manually lock the car .

Bmw must account because my car was perfectly fine before .

Please revert to me.