Premiumize Code Not Working in Kodi

I bought the subscriptions and was unable to put in the required code. I contacted premium customer service to get help on installing product and after several emails they were not able to get it to work. I ask them to call me and walk thru together but unable. I asked for refund as we are unable to get processed but they refuse

So just to make sure I understand the initial problem, you are trying to authorize Premiumize into a Kodi Add-on, and it is showing an error when you do that? Could you tell us what it said, and/or show screen shots of your process?