Furniture store still wont refund me after i cancelled order

I ordered around ~20k furniture from a big store in manila (not ikea tho) by ordering manually through their IG. Nagsend lang ako pera through maya to their bank account to get the item, tapos nagcancel ako kasi the item was not delivered on the original agreed upon date due to issues on the store's end.

I asked for a refund. One to two weeks daw before marefund ako. Its been past two weeks. I have a sneaking suspicion nagdedelay tactics lang sila to discourage me to get the refund or baka sukuan ko na lang.

Already filed a complaint sa DTI a few days back through their complaint form, pero haven't heard from them yet. Tumawag ako at inaway ko yung store last Friday kasi wala pa ring balita sa refund ko. Irerefund lang daw ako if I sign a waiver ng quit claims kasi yun daw policy nila. They did not mention this before. They sent a photo of a check, yun na daw pera ko. Sabi ko sige fine, isend na sa akin ang waiver at ilalamove nila yung check to me ng matapos na.

It's already sunday. Wala ulit silang paramdam until guluhin ko sila sa message. Ready na daw ang refund and waiver, pero nothing is being sent to me.

I follow up ko na lang ba yung DTI complaint ko and get this settled in court? Or ipressure ko na lang sila na irefund na ako ng maayos (bank transfer) and actually send the waiver na sinasabi nila. I'm not in a rush to get the money back, I don't mind waiting if it means they get fined or something pero idk if they actually will if I do pursue it?