Sulcatas need ambient no lower than 27C day and night. They must be able to bask at 35-37C day and night. They need complete darkness at night so ambient heat can be provided using a Ceramic Heat Emitter with a thermostat to control the temperature.
Sulcatas are unusual here in the UK. You are sure you have a Sulcata (African Spurred) rather than a Greek (Spur Thighed) tortoise?
Sulcatas grow to over 50kg and don't hibernate. Greeks to a max of 3.5kg and do hibernate.
The temperatures required are similar for both, but before I give you the correct care information I want to be certain