Such bad Customer service from Booking. Com. Worst Company Ever

I made a hotel booking through them and in error i chose the wrong selection that did not include breakfast. I contacted customer services since they claimed on the website that you allowed to make changes to your booking but to my surprise they were very unhelpful. All of a sardine they pushed the blame on the Hotel. I contacted the Protea Hotel Marriot in Mafikeng and they said they would gladly assist me as this is a small error but since my booking is done with booking.com they will not want to recitify the mistake. They are not the most customer friendly company. They even require a full refund if you cancel. What utter bull. Such bully from a Company. Costing me R420 per for breakfast because they are impossible.