OP, I'm going to ask this again:
You posted evidence in the form of two receipts issued by the on-site machines which showed failed transactions.
Each of these was for an amount of money which when converted to time through the tariff would have given parking times in excess of the max. permitted.
These amounts are printed clearly on the receipts.
You claim a malfunction with their machines.
If you did not enter £14.02 and 14.09 respectively but the machine read what you entered as these amounts then clearly the machines were at fault.
If you entered these amounts, you were at fault.
These has nothing to do with the council, so don't ask them!
This is about you and the machines.