They have provided me withdrawal address, but they did not provide me IPs.
If it's okay with you, can you share that withdrawal address? If not that's fine too. In case the funds have been sent to an exchange, you could choose to notify the exchange in question and see how far you come, but they will very likely demand evidence of actual theft. In other words, I would pressure bitcoin dot com to release more data such as the IP's. I don't see why they will show you the withdrawal address but not the IP.
Yes, that is him. But maybe that is not directly him who doing scam. It might be their staff.
I do not like Roger, but I highly doubt that he or his staff is repsonsible for the theft. I can be completely wrong of course, but it to me looks like a classic case of a hacker having had access to OP's system and stole the funds. Or, the site has been compromised, but if that was the case there would have been more complaints on both the Bitcoin and BCash side, which isn't the case.