G2A Refund

What do you mean? You can't SE them just like that, you can refund them though

Yea but you can but if you keep doing it you cant use their paypal on their website

Would refunding G2A be hard?

No it's actually pretty easy, just charge back on PayPal

Is the process just charging back? No contacting support or anything?

If you chargeback and don't contact support sometimes they will say "You never contacted support or whatever" so just chargingback is a little risky. Also, it screws up your account.

Do you recommend I contact support and se?

Ask him:
http://www.mpgh.net/forum/showthread.php?t=1246164

Add him on Skype.

I did around 12-13 refund on my account and its still working just dont refund high amount )

28 is good ?

Yeah they do, but probably your pp will get banned after from g2a, so no further purchases can be made