Tata Consultancy Services — BGC failed reason Payment Cash mode on 2 year and 10 months in my first Company

My name is Shahin N P and my employee id is 2637272. My first company was Butterfly Portal which is located in calicut and I have 5 year and 10 months experience there and then I joined IBS and now joined at TCS on 24th Apr and yesterday I got a call from hr tell that bgc is failed and only one option is resignation. The bgc failed because of my first company. When started my carrier at butterfly portal in June 2016 their salary payment is through cash. they only started pay through bank from March 2019. I show all statement from March 2019 - March 2022 and also provided HR contact number and mail with verifier and it went fine. But tcs hr called me and tell that the bgc vendor marked first company as fake. I have my offer letter xeros signed and my mail still has their offer letter mail time stamped from June 2016. Am depressed and I rejected some offer due to TCS offer. I lost faith in tcs. They even give any chance to prove. They only do online checking about company. Not verify its existence in another ways.