CBS print Consumables terrible service

They harrased me continuously after telling them I did not need the ink. They then promised that if I took delivery now, I would get the special price, and only pay in 6 months (when I said I would need it). They then delivered, and are now calling for payment (3 weeks later), with a very rude and abusive manner. I told them to collect it and take it back, but they rudely told me no I must pay them.