Wait or look for another workshop?

Good day GF Community,

My car needed repairs and at the end of January I went to an official workshop for my car brand. I told a mechanic what needed to be done or rather what was broken and asked for a cost estimate. My details were noted down and I waited a whole week for a reply but nothing happened. When I then called the workshop to ask what the situation was, they said that they would have to order the parts because they didn't have them in stock. They hadn't yet provided a cost estimate because they couldn't get the parts at the moment. I then asked for a cost estimate again and told them that I would take care of getting the parts.

That was at the beginning of February, so I did some research online and bought the parts I needed from reputable manufacturers or original parts. After another two weeks had passed and I still hadn't received a bill of sale in my emails, I called the repair shop again to say that the parts were on their way and would arrive soon, and that I'd like to know how much the repair would cost. The repair shop then told me that they would create a bill of sale that same day and send it to me.

Again I waited a week and even wrote an email with the part numbers and what needed to be done, but again nothing happened.

At the beginning of March, I called again and asked if they had received my email. I was told that only the boss had access to the email (the email is on the website under "Contact," right below the workshop's official phone number). Anyway, I wanted to believe the employee and told him again that I was waiting for my health insurance statement.

Mid-March

After giving the workshop an eternity to get back to me, I called again to check that all the parts were there, and I was just waiting for the bill of sale. I was told someone would take care of it in the next few days.

At the end of March, I called again to ask how things were going, as I was planning to take my car on vacation this summer and wanted the problem resolved. The boss personally answered the phone and told me he'd sent the bill yesterday. When I replied that I hadn't received it by email, I was told it had been sent by mail.

Now tomorrow two weeks will have passed since the conversation and I have neither an email nor a letter in my inbox.

My guess is that nothing more will come of it. What do you think? Should I call again and ask, or just wait? Or just find another repair shop, since I never signed anything since the cost estimate was only agreed upon verbally.

LG