Hello,
Thank you for contacting.
For renewal of service you can go to your RMS account. There you will see an option for services>Management on left (Last option) and you can renew service if you have enough credits in your account.
For buying credits you can either contact you sales Manager or you can login you RMS account and there in Services>Management you will see an option to "Buy Credits" on top right corner under Notifications .
After you buy license you might get a token number and you will need to insert that token .
Follow the steps to activate code:
Login RMs account.
Click on your username on top right corner.
Credits>Activate Code.
Thanks.
I hope it helps.
Regards,
Ahmed