Hi there, my name is Adam. I've just read that you have some errors in PS, probably in loyalty module.
From your description, I assume that you have PS in version lower than 1.7?
I'd like to take a look at this. Debugging errors in PS isn't too easy and I can't guarantee that I'll be able to fix it, but I fixed a lot PS errors so far.
I'm server admin in my full-time job and as a freelancer, among others, I maintain few PS shops (updates, small modifications, issues resolving).
I'll need an access to your hosting accounts and an access to your PS backend. And of course, some time to take a look at this.
Let me know if you are interested and we could talk about the details on chat
Regards,
Adam