No refund of my deposit

Rented a car for 2 months at R2700pm plus R2700 deposit, got a flat tyre, they told us insurance doesnt cover it and we have to sort it out ourselves.. gave the car back, now we're waiting to get our deposit back and its 2 weeks past the 14 working days wait. Its now been longer than a month since we've returned the car. They dont reply to ANY emails, and the phone number on their website doesnt work... please help