@chinmay how did you conclude that the source of the Issues was Refinitiv itself ? As far as I know they are really huge organization serving more than 40,000 Big Institutions in approximately 190 Countries. They are not some small local firm for whom handling the load of zerodha clients trades could be a big issue. They are already handling 100 times bigger trading loads for many of their big clients abroad.
To get some idea about their data handling ability, please note that, they record live streaming real tick by tick data of NSE and make it available for their clients, in real time, which includes every single bid/ask updates and complete market depth etc for all NSE symbols. No other company in India is providing such service. You need to have your own CoLo Servers if you want such real tick data with every single update. You can ask @nithin about it.
It is good that zerodha has updated their data center, but the fault was not at Refinitv end. Please correct me if I am wrong.
Thanks and best regards