credits not given to customers with subscription

Hi,

The support form on your website is broken and I get no responses via email so I’ll try it here.

I have credit plans connected to different variations of a subscription product. The payment and everything goes well, but the credits are not given to customers. Is is only the case that customers get the credits on the first payment? And is it possible to give them credits every payment/subscription date?

Hopefully you can help me!