This company has the worst customer service and whatever percentage cash back they're showing on the website isn't true and never happened. I've shopped lots of times using priceline through rakuten and they said I can get cash back 3 months after staying at the hotel. However even after 3 months,I couldn't get any cashback, the reason they said if I purchased exclusive item or canceled,exchanged or returned. For hotel I wish I could do that. They just don't want to give cashback for big money because $700 or more total price for one time of priceline shop and I did 5times. Not only this, even you got the cashback it's wrong percentage of cash. When I shopped jcrew through rakuten it was 10% and I just got 4% bc when they added cashback the percentage already changed. That means how much % you get back depends on when they add cash to your account.
It's total scam and socialhelp email thing never worked either. So, do not waste your time for solve your issues.