i heard that they provide instant deposits and withdrawal service .
nowadays, koinex, bitbns, coindelta are also providing instant everything. I'll suggest buy through those who offer some real support. You can search coinome on telegram where you can find a few people have faced the problem. I think the problem is with UPI/IMPS technology and those exchanges who are using it. But with real support you can solve your problem. coinome doesn't have any support anywhere.
Have tried zebpay and bitbns. Had decent experience with zebpay, amount got credited in 10-12 hours. Worst experience with bitbns. 6 days and I am still trying to track my money with their support team. Be Careful if you guys try bitbns to withdraw funds to your bank
I still think anyone using UPI IMPS technology on their platforms have this very problem. UPI IMPS isn't mature enough. I think transactions above 2 lac will be more reliable. Lol.
BTW you should join telegram communities of these exchanges. They provide good help on them except coinome.