Unacceptable price change

Please be careful when booking via email - i was sent a quote for 2 nights at the Sun City Hotel 23rd and 24th December - with Gold card discount - when i rep**** to confirm my booking - received an email stating that i was quoted per night and the cost increased by R8000 - we were going to celebrate my Birthday on 23rd December - now i have to cancel with friends who were also going to book -