I've encountered this problem with superglue. I thought I'd be clever and setup a monthly subscribe and save and I ended up having to send back a single tube tw

I've encountered this problem with superglue. I thought I'd be clever and setup a monthly subscribe and save and I ended up having to send back a single tube twice - the first time a single replacement tube was sent back to me, and the second time I received a credit and they cancelled the subscribe and save. It's basically impossible to get through their automated returns system to get the desired result - that is, receiving what you've already paid for. Years ago, a similar situation would result in a "keep the item we sent by mistake, and we'll dispatch the quantity you paid for." This behavior seemed to rely on human support personnel.