MRF Tyres — Manufacturing defect in MRF Tyre for my Car

I bought Swift Dzire which came with MRF ZV2K tyres. Aftr 14, 000 kms running, I found manufacturing defect in one tyre and the tyres both sides become weak and have snap/cut. The other 3 tyres are in totally good condition after the same running but only one had this problem.
I go to MRF tyre office Plot no, 11C, Ring Rd, TT Nagar, Scheme No 94 Sector EB, Indore, and after checking the tyre thy just said it is not manufacture defect.

How they can say it ? if it is not manufacturing defect then why 100 of cuts are showing in tyre.

Please help.