I called the hardware store and got advice on the ...

I called the hardware store and got advice on the phone whether the high-pressure cleaner that you can borrow there is able to clean marble slabs. I was told very clearly that this work could be easily removed with this device. So on Friday around 3:30 pm I borrowed this device for a day. On the same day, after 3 hours of work on the plates, I noticed that the device couldn't get the plates clean. I called OBI and complained about my case, whereupon I got the answer. I should take photos and bring the device and photos over to them the next morning. Since I couldn't be there at 8 a.m. myself because I had to take care of my daughter, I was actually only at the OBI at 12:30 p.m. It was about an amount of just under 30. I was told that you do not want to literally * fool yourself * from the customer and that it can just as well be that I got everything clean and could now claim it (attached photo 2 days later)
After an intensive conversation, we had to go as a customer who wanted to * kidnap * a hardware store.
Such a situation is absolutely not acceptable to deal with a customer in this way today!