Matlab License payment could not be processed . I have tried many times .How to complete it . I have used my trial period. Please tell me .

Hello

I have used trial period for matlab . But now i am trying to purchase license for matlab (student version) but i stuck at the billing stage that could not be processed . How to complete it ? Please help

[Walter Roberson]

sorry, the volunteers who answer questions here do not have access to the license database and are not able to assist with this. You will need to contact Mathworks Sales.