I would not recommend removing the feedback first, like S said.

Kia ora Howard, This website doesn't seem to be related to Trade Me; I highly doubt this issue stems from Ping. I would recommend contacting your bank via the number on the back of the credit card and letting them know about the continued unexplained charges - they would be your best people to contact.

You can refer to instructions on how to transfer money from your bank to ping account here Ping account – Help - Trade Me https://help.trademe.co.nz/hc/en-us/articles/360007264411-Ping-account

Not 100% sure... I could've swore it used to be possible too, but this is a screenshot from a recent conversation I had with MᶜKay a few weeks ago.

Just to rephrase, you can't place an FPO until three days after the listing closed. Has it been three days?

How many days has it been since the listing closed? I know that FPO's can only be sent on sold items a number of days after the listing closes, but I don't remember exactly how many - I think it was three days.

Yeah with that condition flossy63 mentioned, it's now clear to me Ping is more targeted at 'In Trade' high volume commercial sellers.

Just to add to that, I generally for most products there's a lot of price competition if it's the Chinese made kind-of-stuff stuff, so it shouldn't be hard to find someone else that accepts Ping. Otherwise, generally other sellers will inflate the listed price to incorporate the cost of Ping. If you really want Ping, and am happy to pay a little extra than the listing cost for this, I'm sure offering the seller an extra $5-$10 on listing price to cover the Ping fee might work with a little convincing.

I would recommend contacting Trade Me with this one - it sounds like a new technical glitch they may not be aware of.   Submit a request – Help - Trade Me