Incompetence, arrogant and don't care attitude

I took my vehicle in for a service on 7th December 2022, a lady named Alicia was my contact person at Bosch. She called me around 14:00 pm the same day, and informed me the vehicle was going to be ready for collection by 16:30 pm. However she said they found a faulty temperature fuse, and if i agree, the part was going to be ordered, and by the time I would collect my vehicle, it would be fitted. I agreed for them to carry out the necessary work.Upon collection of my vehicle, the part was not there, and it wasn't fitted. Alicia than committed to call back the next day, so I could return my vehicle so that they would fit the faulty part. This never happened, several days passed, then weeks. I then started calling her, however their landlines were not in working order, I then went to the branch to enquire further on the outstanding matter, this was now on the 26th January 2023, Alicia profusely admitted her incompetence and again committed to call me on the 27th January 2023, and email as well on all outstanding matters. In addition I also requested that she gets the owner of the franchise Carlo to call me. This once again never happened, and demonstrated their arrogance, incompetence, and don't care attitude. In all this, I even requested a quote to service another vehicle of mine, which Alicia promised to also email me this request. I have not had any feedback from Alicia, no call back from the franchise owner as of the 4th February 2023.