Lumpy vinyl flooring issue - what to do?

[Lumpyfloor]

We had LVF installed on a brand new concrete floor extension 2 years ago. We weren't thrilled with the job at the time, but it was ok and liveable.
Since then (around 1 year later) little bulges started emerging in various places. We called the installer in and he lifted the tile and stated that the cause is the concrete bulging and lifting the screed and making the bulge in the floor...
Recently more bulges have appeared and still seem to be appearing and some areas are really uneven and lumpy. It isn't really obvious to the eye luckily, but I know where the bumps are and I can feel how uneven the floor is.

I have found information on the internet which suggests this type of flooring shouldn't go down on new concrete if thur moisture content is too high, which it apparently still will be even 2 months after it is laid. I don't believe this was checked at all.

What would you do about this after this amount of time?

Was the installer from the company you bought the flooring from? I'd expect them to have known this. If they won't rectify then you might want to go through your home insurance.

He is an independent guy. I went back to him after the lumps started appearing and he seemed to think it was down to the concrete beneath his screed.
Now more lumps have appeared and I have managed to find information about moisture, I feel it is his error and I need to go back to him.
The problem is, I also don't trust his work now, but is that the only way to get a new floor apart from insurance?

Thank you!

Are you sure that insurance would even pay out if the floor has been laid without following the manufacturers instructions?

I think the installer should have established the moisture content of the sub-floor before laying the screes, so he should be responsible for rectifying it.

Most LVT is guaranteed for 10 years or so when installed by one of their approved fitters (eg Amtico, Harvey Maria)- was this the case?
If not, he should have his own indemnity insurance, hopefully!