Welcome to the Magix user to user forums, so not a contact for any Magix staff and no-one who posts here can do anything to enable you to receive a refund.
Assuming you bought the product within the past 14 (?) days you can email infoservice@magix.net and request a refund for your purchase.
I suggest you register at and repost your question to the dedicated Samplitude Pro forum, here. In the meantime, since your question is really irrelevant to this thread (which is not about Samplitude Pro) I have hidden your post.