I worked in CS for a couple years. I'm not excusing how they treat people at all, but please know it's often as frustrating for them as it is for you. Different information is available through different systems, some don't have access to them and some aren't familiar with them. This is done deliberately.Slightly OT, but this reminded me...I almost feel like CS are generally not very good at identifying the issue quickly when it's related to stuff like purchase limits (and bans). I was in a thread in the LV sub-forum recently, where the OP started getting into the brand so they purchased multiple items in a short amount of time, and hit the LV limit so their orders get cancelled. But when they called CS, CS didn't tell them that's the reason (instead it was like, maybe item was out of stock, let's try again...and of course the re-try also failed). And LV even lists their limits on their official website in plain text! But for some reason, CS didn't identify the problem. Maybe they have to follow certain scripts and can't or don't deviate? It's just nothing but frustration for customers. I'd rather be told the truth even if it is accusing me of being a reseller, I want accurate information!
Most aren't going to suspect a customer has been banned out of the gate. Credit card and account issues do make up a lot of their phone calls and no one wants to go worst possible case scenario when someone's just entering the wrong zip code for the card. Information on bans is likely in a separate system and I doubt any company would trust their CSRs with the details of the causes. Not because they're untrustworthy, but in their attempts to help, would share this with the customer and if said customer was actually a reseller, teach them how to game the system, or potentially opening the company up to litigation which the CSRs are not trained in how to avoid.
All of this is predicated on wanting to keep bad actors out. Honest customers, like OP or the OP in the LV thread? Unfortunately, they get the run around or treated like they're guilty. If I had any say in how to make this better, they should set a flag on the accounts and have a dedicated, trained team familiar with all of the nuances they have to know to answer these calls that customers are referred to. On the flip side, and the reason they may not do this, is because quite frankly, if I'm treated like this by a company that I had spent substantial sums of money on, proving my innocence is not worth it.