Well I got the Octavia back this morning, although to get it fixed cost me £430! Basically the alternator had broken, and a couple of the belts needed fixing, these are important because the battery wasn't charging while it was driving.
The car has done over 120,000 miles and I think it might start falling apart soon. This is strike one basically, we can't afford to keep paying these enormous repair bills. Two more bills like this and I will have to sell it.