1999 Other Jaguar Models Heating Problem in the Cabin

I have a jaguar 's' type which has developed heating problems.
Irrespective of the temparature I set in my car, no heating filters in at all, similarly the fan speed dial will not respond whether I increase or decrease from min to max. No sound comes from the fan at all, no heating comes through into the car either. Initially, the heating was the only problem, but now the air conditioning has gone faulty as well, no response from it also.
Help, Moses.