7 years? Are you sure it's not something like 7 days?
Always dispute negative credit items; more likely than not, it won't be verified and is usually removed. Otherwise, wait 7 years and then dispute again.
I've tried all sorts of p2p methods over the years. All of the banks are too confusing, obscure, or too limited (i.e. only within their bank). Paypal and credit cards charge a not-insignificant fee. Venmo or Square Cash work fine if your group of friends accept them--but more than half the time, they don't for me.
I often do ACH transfers between my own accounts, but the first time I set it up a cringe a little bit and cross my fingers. It sucks waiting the 2 or 3 days waiting to see something. I can't see small businesses accepting ACH as payment because they want something in hand. If we had the setup I've heard about in Britain or Europe, I can see checks going away, but with as much churn as I've seen in this space in the 20 years since Paypal, nothing seems to stick.
Try cash? I use cash for almost all transactions like that and have never been turned down :-)