I bought MATLAB and Simulink.
At that time, I didn't know that I need Symbolic Math Toolbox to use 'syms' command.
So I clicked 'Buy Add-Ons' to buy Add-Ons.
But, it showed me the error like this.
'Unable to complete your request at this time. Contact Sales for assistance.'
I already used Service Requests but it didn't give me a help.
So I need your help.
What should I do to buy Add-Ons?