I recently bought a kit from Toner Wiz for refilling the toner cartridges for my Dell 3000cn printer. The kit was supposed to come with instructions and a funnel for pouring the toner into the cartridge.
The kit arrived with neither instructions nor funnel. I sent them email at their support address. They emailed back the instructions and said they would send a funnel. They didn’t send it. I emailed them again and asked again for the funnel. They never responded.
I discovered later from a Web search that they actually stole the instructions they sent me from a different toner vendor’s Web site. That vendor published their instructions as a PDF. The Toner Wiz people took screen shots of the PDF in pieces and pasted them into a Word document.
I do not recommend these folks.