Vicky Pedia, come on, please pull yourself together, it sounds like with us and that was terrible for us. Maybe something can still be adjusted and things will go better for this client.
I am not familiar with dynamic probing tests in their significance, only load plate tests. I would spend the money for that as close as possible before the slab is poured. Did you leave the foundation cushion as per the order at Heinz von Heiden?
It is advantageous if you no longer make complaints only by phone. You can still speak politely with each other and communicate the email or registered letter as a formality and send it afterwards.
Site managers from Heinz von Heiden have a requirement within which time they must process and respond to emails. However, according to our experience, they do not manage this. Therefore, they are quite keen on communication methods that do not fall under this requirement and control option, phone calls and SMS, for example. Needless to say, this way clients could not keep any evidence. But this can become necessary very quickly.
I wish you a construction project that you enjoy!
Best regards Gabriele