Gardener only mentions net prices

Did you have a fixed price offer? Was the VAT shown in the offer?

Or did it say something like plus statutory VAT?

Did the landscape gardener formally register the additional service?

There was a flat rate offer for the most important work (incl. VAT). Gradually, something was added that was discussed or decided during the work. So always according to the scheme: "We would like this and that as well. How much does it cost?" We then received prices, mostly via WhatsApp, after which we commissioned the work. Unfortunately, the prices quoted for the additional work were always net...

Was it flat rate including VAT? Or net and VAT shown separately?

I am just imagining how it is supposed to work with the different VAT rates?

Was your plan or description so bad that it resulted in 40k additional costs? How high was the original contract amount?

Was your plan or your description so poor that it resulted in 40k additional costs? How high was the original contract amount?

To get ahead of the OP: Read from the beginning, it has already been explained several times what the initial situation was and what was added.

To get ahead of the OP: Read from the beginning, it has already been explained several times what the initial status was and what has been added.

I have looked through again. Did not find the original contract amount.