Webuycars fault repair refusal

I bought a car on 5 Aug with 3 faults. 2 have been fixed after 6 weeks and a lot of mails. There was a crack in the right front rim. Webuycars refuses to pay for the repairs as the Dekra report should have shown it according to them. It came to my attention as a slow puncture when the tyre shop showed the crack I have paid R850 to repair the crack. Photo is available