Usual busy queue at Palma on 21.9.22. I had paid for the hire plus "comprehensive" insurance " via Rentalcars.com . My voucher clearly said so & which I handed over to Goldcar staff to confirm my booking. It was not handed back & I regret that I failed to ask for it . My credit card was charged & ringed by the agent "deposito" on the invoice with the explanation that this was to cover a full tank of fuel if the car was not so returned together with a small charge (11.09 euros -"Oficino Premium ?") for collecting the car at the airport. I had been waiting in queue for 30 minutes. I was keen to get on with my holiday. The zone was not air-conditioned. My wife was waitng with the luggage in the car park. We are both non-Spanish speaking pensioners in our 70s. Nothing wrong with the car, apart from under-inflated front tyres. Return of vehicle with a full fuel tank was efficiently handled. Subsequent credit card statement indicated that I had been charged for extra insurance already paid for. A typical scam which I wallked straight into & needless to say correspondence with Goldcar got nowhere; they preferred to ignore my copy of the invoice which, yes, clearly bore my signature & my consent to being (double) charged for extra cover ( "Super Relax") I'd already bought, & which also bore the agent's marking at the time he profferred his inarticulate explanation for the so called"deposito total". The conflation of the fuel deposit & the extra unwanted insurance cover seems deliberate & in my case took advantage of a tired traveller who should have been more alert. I shall not Goldcar use again nor recommend.