every single destination for December is sold out

Every year I book my holidays through my protea prokard and today with great disappointment all chosen destinations Cape Town , Durban everything near a beach is fully booked it's only June this is unfair to people like me who loyally supports this grp of hotels only to find they fully booked by travel agents etc. How possible is it that everything is fully booked for this period it seems like madness. And then we expected to pay double at kulula and other travel agents. I am truly disappointed as I planned to book my holiday via protea but extremely disappointed that its all been fully booked and if this is checked one would find its been booked by travel agents who explote the prices. December plans seems to be ruined now. And having prokard is a waste of time since it can tell used during december the only month were working class people get leave and now only to be exploted by travel agents