AWS SAA-C03 Forensic and statistical analysis INVALIDATED the exam

Yesterday gave exam of solution architect associate, exam went well, point to be noted: exam was given from AWS allotted test centre, followed every instructions did everything, later after finishing exam, 2 hours later received an email from AWS that we cannot validate your exam as they found some anomalies in forensic and statistical analysis for which I am having hard time to understand this at all, how this can happen and why this happening, if only I'd given the exam from my home they genuinely had right to have benefit of doubt, but in this case where exam happened from their own alloted test centre for which I had to travel almost 100 km far and receiving this is upsetting and unacceptable from such a brand, and they even mentioned they have revoked the permission for me to be able to give exams through home in future, is this some joke? Can anyone here explain to me why this is happening, this is not correct, this is not ethical, and this is not acceptable!