Have a payment credit card installed in worldpress, but this only accepts payments for one-time payments. But need a recurring payment. Need an experienced developer who can rewrite scripts so that monthly payment can be debited.
33 freelancere byder i gennemsnit $170 på dette job
Best and simpliest payment gateway for this purpose is SWtripe. if is available in Germany, you can done this job really fast and efficient. Problem for me - i dont know WP, i just advice you