"Parking"

I was recently visiting my mother and whilst I have no problem with the care and facilities of the actual hospital I have to say your parking facilities are not only extremely expensive but the new machines are very difficult to use. Yesterday I tried 3 before I could pay (they wouldn't take cash so I had to use my debit card ). I was not the only person experiencing difficulty and can only imagine how upsetting these machines must be to elderly/vulnerable people trying to visit loved ones - that's if they can find a parking space in the first place. I tried to raise my complaint with the parking office but they were not interested and told me to take it up with the trust. I feel it is hard enough to have loved ones in hospital without having to worry about parking. I am also hoping that the money taken is ploughed back into the hospital?