Booking.com Registration

I bought my business Villa Langa B&B ON 01/01/2015 from the previous owner who has a tenant at Villa Langa B&B and unknowingly there was according Booking.com a outstanding issue regarding a double booking that took place days before I took over made by the previous owner and therefore I have to first pay four thousand and something rands before Booking.com will allow me to do business with them. I took it up with the previous owner Mrs Poppet van Rensburg and she deny any knowing of such issue and support me by writing a mail to *** explain to them that by the time I took over there was no outstanding issues with them nor any outstanding money or knowledge of a double booking. Hard to say Booking.com take this firm stand that I have to pay the outstanding money. I have correspond through numerous emails to them and beg them to accept me for I am a new owner and has nothing to do with things or issues prior to 01/01/2015 hard to say up to now I did not manage to move them one inch. I surely think they discriminating against me and bully me for something I didn't do. As for literally thousands of tourists book through Booking.com this hard stand attitude harm my business tremendously.