A platform never to be used to book accommodation-Hotelsclick.com

I booked on 22nd October for the Hilton Durban and paid in full and received confirmation and a voucher for my stay from hotelsclick.com. On the 28th of November 2018 which is 2 week before my stay, I received an email telling me that my booking is cancelled and I must work thru some other platform to re-book. I immediately contacted The Hilton Durban and confirmed with a reservation agent that my reservation was in order, received a booking reference number and payment was received. I sent off an email to *** advising them of my communication with Hilton Durban and their confirmation of my stay. This morning, the 5th of December, I got another email from hotelsclick.com that the reservation is cancelled and I should apply for my refund in writing. I find this totally unacceptable as I booked well in advance to get the best pricing and let down 2 weeks before the requested dates of my accommodation.