Who's the mug now?

STILL UPSET AND HURLING INSULTS SO BE WARNED

I had a terrible night tonight. I went out looking to earn serious money but it just wasn't out there. To cap it all I got bilked for £16.40 by an Aussie bird. I picked her up at Parsons Green and she asked for Clapham South. 100 yards down the road she realised that she'd left her phone in the pub she'd just left. She asked to use my phone to ring her phone and when someone in the pub answered she told them she'd be right there to pick it up. We pulled up outside the pub and she ran in and emerged smiling a few seconds later, phone in hand. We carried on to Clapham without incident.
She directed me down a couple of streets and then told me to pull up at the end of another street. All of a sudden she said "Oh my god, I can't find my wallet. I'm sure I just had it." I just sat there with a "here we go" look on my face while she proceeded to look here there and everywhere to no avail. Was she acting? Who am I to judge? She looked genuine enough and I suggested that she could send me a cheque to which she redilly agreed. I wrote out my name and address for her and she promised me she would send the money to me straight away. I jokingly said that I had her number, as she had used my phone, and she again stated that I'd get the money ASAP. As I drove off I thought how I could have done with the cash but £16.40 wasn't a vast sum and I could wait for the cheque to arrive in a few days. I decided to send her a text reminding her that the fare was £16.40 as I hadn't written it on the piece of paper and also added that I hoped her wallet would turn up and finished with a "Take Care". I sent it and recieved a "Message Delivered" report on my mobile. Three minutes later my phone recieved a message so I thought it would be her re-stating her intention of paying me ASAP and maybe a nice little note along the lines of "Thanks for being so kind and understanding". As I opened the message it read "Wrong number". Fucking sxxx!!! I rang the number and some guy answered. I asked to speak to the "Aussie bird who'd just got in" and he said there was no Aussie bird there. I explained how she had used my phone to dial that number but he wasn't having any of it. There was nothing left but to slag him and her off. I said "I know you're covering for her and I'd probably do the same but just tell her from me she's a no good fucking sxxx and if I ever see her walking down the street I'll run the cxxx over" at this point he said "Fuck you" and cut me off.
The thing is I hadn't seen which house she entered as she walked round a corner so basically I was stuffed. One day I'll do the name and address thing right and get some sort of collateral before allowing non-payers to just walk away.