Thank you all for your very helpful reply. I got a trustworthy electrician to fix the minor issues. The electrician said that they repeated mention same thing multiple times as C2. The 'high' R1+R2 reading in their report appears to be normal. The electrician only charged me £50 and provided a detailed description of the problem of the EICR and the remedial he did. Only a couple of clamps were required.
I will refuse to pay the company who did the EICR. Bad trademan! Will blacklist it.
EICR opinions are like 'bottoms' - everybody has one
You ask 2 companies you will get at least 2 opinions
You have contracted the company to carry out an EICR, you have a legal obligation to pay them.
The EICR you posted looks unimpressive, but it is stil an EICR, You need to pay.
You now have a company that you know not to use again .