Solutions to reimbursement difficulties.

So, my work is giving me a difficult time about reimbursing me for just about everything on a work trip I just took. One of them is for a taxi ride in which the driver was unable to produce a receipt, so I printed a copy of my bank activity with the transaction listed. Well, apparently that isn't good enough and they are refusing to reimburse me, so I sent an email that said...

"Some taxi companies don't give receipts, as was the case here. What am I supposed to do? Take a picture with my phone of myself in the taxi handing the guy money or my credit card?"

Oooops. I probably should have shut my computer for 20 minutes before sending that one... regardless, I "took a photo of myself" paying the taxi driver. Think this will work??
They also won't pay me for parking. I'm sorry, but I don't know of many parking meters that print receipts. Here's the photo I "took of myself" putting money in the meter.