Help! cant buy imvu credits?

ive been trying to buy credits at a discount website called imvuce.com....every time i try to buy some credits it wont let me. i make sure all my information is right but it says "We are sorry to inform you that your weekly buying limit has been exceeded. Please wait for Our support team to check your profile." i have never bought anything from this place besides me trying to. i waited a week before using it again but said the same thing. if you have any answers to this i will need it. thanks