How to not receive phone messages from Gameflip

I have just received text message from you guys saying “Welcome to Gameflip, we’ve added $1 in Credits for your first purchase. Hurry, expires in 2 days.”

I don’t wanna receive any more messages from Gameflip, is there anyway to block it?

Hey, we may need to supend your account for this not to happen anymore.

Please, if you haven’t done so already, contact us at support@gameflip.com,

Thanks!