The background:
In March we received a ticket from a private parking company for parking in a 'restricted area' - the area we had parked had no paint to indicate this until a few month after our ticket was issued and we argued that if they had painted it already we never would have parked there and gotten a ticket. They then said we had breached their contact by not being parked within a set of white lines, and also in a letter falsley claimed we had returned to our vehicle and refused the ticket from their agent. We then made an Independent Appeal basically saying it wasn't fair to charge us when they hadn't marked the car park to let us know the area was restricted, and that they were switching to the parked within white lines argument which wasn't how the ticket was issued. The parking company fabricated a false copy of the issued ticket apparently showing a had written note on the back of the ticket stating we were not parked between white lines - we have the original ticket which show this isn't true. We only found this out when we were notified that we had lost the appeal, I tried contacting the Appeal body to say the evidence was fabricated but they said the appeal was closed and that was that. Now the parking company are saying they will take us to court unless we pay £100 fine.
The question:
Can the charge be upheld because we 'breached' the parking company conditions by not being between white lines even though the ticket was issued for being in a restricted area (which as mentioned was not marked as such) and despite the fact they fabricated evidence for the appeal?
We are pretty disgusted by their behaviour and don't want to let their underhand and threatening tactics win, however we also do not have any spare money and don't want to end up paying a fine and court costs if we could lose on a legal technicality. My husband is convinced they would never take us to court with what they've done and will just be as threatening as they can without taking action, but we don't know the legal position we're in.
We were using our local Aldi supermarket and they say there's nothing they can do about it