mond77:
Next time get help before it gets to the debt collectors coming round. If that is happenning you would be best speaking to Citizen's Advice as soon as possible. Also contact Consumer Focus for advice.
There a several resons more likely than faulty meters for high bills. Having moved out it's a lot more tricky because ideally you need to check the opening and closing readings are billed as provided (assuming you still have a record). It would be helpful if you could break the £1059 into gas and electric. One faulty meter is unlikely, two faulty meters almost impossible.
Other reasons include faulty calculation of gas - not your fault. In 30 weeks you should have had several bills. If you don't have them maybe you should obtain copies.
Is the £1059 the total amount for 30 weeks or were you also making (or not making) monthly or quarterly payments?