You tell the person "I was told I had to pay this <X fee> to release my package but I don't know who or where I pay" while waving the cash around cluelessly. The person will 100% then offer to take it and "handle it from there" under the stupid guise of plausibility.
I tried giving a gift to some, as thanks for letting me sleep on their couch. They told me no no no. I asked my friends about it, they told me it's about face.
Omg, I get that honor is a big thing, but it makes normal interactions way more complicated.
"You'll have to pop in next time you're in the area!" does NOT mean "turn up at my house unannounced". Even if it sounds like it.
Or "How are you going?" is not a prompt to actually tell them how you're going.
I'm told that, in China, a way to greet someone is to say: "Have you eaten yet?" 你吃了吗
You are not supposed to provide a detailed answer such as: "Yes I ate a breakfast sandwich this morning at 8 am".
Instead you simply say "I ate" (吃了) or "Nope" (没呢)
Some areas may have it to a lesser extent (China were the cultural revolution steam rolled everything and only left superstition) but the concepts shared remain the same,the expression of the pattern varies widely.
Sounds like they thought they caught a reseller endangering somebodies sales friendship.
Regarding money, you should start with cash. Have an amount you think is fair on your pocket. Tell them this is what you have and thank for their help. If they don’t look happy or they reject/ask for more, tell them it though, but that you need check if you have more in your car. If the difference is a lot, say you need to ask friend for help. Go back to your car, pretend to talk to someone and come back with more. If they really want a lot more, ask for they’re bank account and tell them you’ll need to transfer (throughout make sure to show them that they asking for a lot and this is very hard for you, you have kids, need to eat, get a cab, pay a loan, etc). Also if you tell them you’ll transfer from a different bank than theirs, they might settle on the cash because interbank transfers are not same day.
All this varies by country and what methods of payment are available.