omg, how hard can it be? i have no idea how these offers work, but use some common sense. if it takes you to sponsorpay's website, and there is no support tab, just click on contact --->subject: support ---> explain your case. if the logo doesn't take you to their page, then type the url and follow the steps.
just to check, i just did this (and it wasn't difficult at all): http:/www.sponsorpay.com ---> contact (top right or middle bottom) ---> got a window with "send sponsorpay a message" with some department options: CUSTOMER SUPPORT, monetization, advertising, press. i bet you can manage to choose, write a message explaining your case, and hit the send button. you're welcome!