HP connected ink - terrible customer service!!

I feel that HP Instant Ink is a complete ****. They keep sending ink to me - then when I try to cancel my subscription they are telling me the ink I already have in my possession will be de-activated.

I have tried speaking to the live chat agent - very conveniently the chat is disconnected when I complain! Have also tried to resolve this by email with no response.

Firstly - HP customer service is shocking! I would never buy any of their products again if this is how they treat their customers.

Secondly - what a waste of ink! I have paid for it, yet they are going to de-activate it! I'm truly disgusted. I want to cancel my subscription but want to be able to use the ink they have already sent to me.