Our recent interactions, as I understand them (maybe wrong):

• their automatic credit card payment (paying off my credit card with them from my other account with them) just fails roughly every time

• I try to pay my credit card bill using their website but this also doesn't seem to work

• they seem to have charged me a late fee and interest for failing to pay my credit card bill, though paying it is not to my knowledge possible

• they have recently been declining transactions using my debit card also, and while they say they are processing my online transfer to another account I don't feel optimistic (though maybe they did permit some debit card transactions?)

• there is no obvious sign on their website about what they have against me using my card or making online payments

• I phoned them, but after much repeating of numbers to a hearing impaired robot, the call just ended

• They offer appointments to talk to them, in principle, but do not have any specific appointments this week at the bank I tried or on phones (not sure about future weeks or other banks)

Reasons to expect vengeance:

• This seems pretty bad, especially the bit where I can't reliably use money at all or promptly contact them about this and fix it

• I am not convinced that there are good alternate mechanisms for costs of poor treatment of customers by large companies to be properly internalized by those companies

Reasons against expecting vengeance:

• Forgiveness and kindness are pretty good

• Perhaps I am mistaken about the situation

• I am also not always good at my job

• I have previously contemplated vengeance against Opodo, Comcast and Verizon, and have not exacted any

• I'm not going to do illegal or unethical things, so the options are limited

• One of the best legal and ethical vengeances I can think of is to write a really catchy song about how their service is sometimes substandard, and I'm busy and don't have a particular track record of musical comedy hits

Making or drawing attention to this market doesn't count, and nor does casual verbal or online social condemnation or writing a single review expected to get the normal amount of attention. Randomized vengeance only counts if it falls such that I do it (e.g. if I pick a number from one to a million intending that if it lands one I will spend my life destroying their reputation, that doesn't count unless it lands 1). Efforts to mar their reputation at a larger scale than one Tweet, other than by sharing this market, count.

I won't bet. You can perhaps influence my behavior by suggesting effective vengeance ideas, telling me what people normally do in this situation, or persuading me regarding whether vengence is the appropriate way to deal with apparent corporate misdeeds.