When I try to get new apps. (games..etc) My phone says, "Unable to verify account information. Please call customer service." Is there any way I can do something to fix it myself?

Also, I am having trouble sending and recieving text messages, sometimes it works and other times it doesnt but when it does, it takes like 2 hours to get the message.

Another problem, I can't call now.


Help please? Caring answers will be exalted & voted forr.=]