Just received this response from the seller:

"Hi Chris,

I will send you out another cartridge & stylus today and include a prepaid return shipping envelope.

Then you have multiple options as this should cover all bases. I appears that the suspension may be the problem.

Once you have things running smoothly you can return the pieces you do not want.

But if you are not completely satisfied then both combos can be sent back for a full refund.

Does that sound like the first line of attack for this issue?

Sorry if this causes too much inconvenience.

Regards and stay safe,

Terry."

Not sure I could ask for more than that. A proper service offered there.