Radisson hotel umhlanga overcharging

I have a problem I made a booking on the radisson website last night 28/03/2025 for two nights 28 & 29/3/2025. The response said quickly make a booking because we have last minute special, pay within 10 minutes, R3700 without breakfast and R4200 with breakfast. Because I was driving on N3 with my wife and it was already after 21h30 & we needed a hotel with 24hrs as we were driving from Estcourt, I showed my wife the prices as she was the one driving, we agreed on the one without breakfast as we were going to drive to RICHARDS BAY in morning, we just needed food for the night. I chose to pay R3700, as it was their international site of Radisson, they converted to dollars in bank APP without checking. the conversion to rands. To my surprise they took over R11000 from my card. I quickly phoned umhlanga Radisson hotel, they said I must come, they will sort it when I get there. Fine we got the,they called the manager & we waited for her 30 minutes. She came and started blaming my booking. Com, I told her I didn't use my booking. Com & my booking. Com does take money, they make a reservation and you pay the exact agreed price at the hotel. They said i must check in & they were going to sort the matter in the morning since I said I will look for another hotel cause I need my full refund, they requested me to check in as they were going to sort the matter in the morning. The morning came, up to now they are running around, have no solution & they bul**** me to check in for Over R11k ,now they are running away from resolving the matter and they are hiding with my booking. com who are not part of this booking since I didn't use them. I used Radisson website to book. I really need help urgently, as all my plans for the weekend have been spoiled financially by them.