[mothered]

you mean that ftid is useless now even Amazon didnt find it?

Read their reply:

but we can only issue a refund once the item has been processed by our returns team.

The keywords on which the refund Is pending approval are: "once the Item has been processed by our returns team".  That's what they're waiting on - receipt of the Item.

so better use LIQ or LIT next time, its has more success rate for refund?

They're a variant of the so-called FTID, hence equally susceptible to failure.

and can you please help, what to say to Ofm specialist to try get refund?

They're awaiting the return, so you can't do anything on your end.