My smarty sim card saying it's active I can't call or text

Hi - Thanks, I had a chat with a Support guy yesterday who explained that it's actually like this - 

"I am sorry its nothing like that, some times due to technical error or server issue it gets delayed. But receiving OTP is not an issue, responding to companies messages or short codes messages is an issue , taking part in contests through text is an issue.

Issue is in sending texts not receiving them."