I have taken a look at the tickets and find it weird that they are willing to give you 4 prime carts for your troubles for sending it back, so that it can be analyzed on why it failed.
Unfortunately i cant speak for them but when i call up any of my house hold goods electronics company they ask me to ship it back for service. I do understand your frustration but a small company like this would go under if the product is not looked at and verified that it is not working. I hate to think a precedent like this is set and where they get bombarded with people claiming things that are not working just to receive free items.
In my line of work yes it happens, we got that many times when we first started, we still get that because we get people sending us parts that they claim is not working and we test it out it is. Happens to be another product or a part that is the issue. You also claim to have used it on 5 different batteries, none of which have a adjustable center post and yet you did not want to pull the center pin out to try that fix.
Now Ill take it upon my self and say this.
You have me intrigued. I will personally pay for your order, and on top of that give you 4 prime cartridges. Just for me to see this dead unimizer that you are hesitant to send back.
They have tried to fix it for you, you just dont seem to be fine with the solution unless its your way. I dont think thats gonna work.
