Pick n Pay just won't refund me.

I made a purchase from the PnP ASAP app on 6 March. Two of the items I purchased were not available. I was notified that they tried to refund but my bank wouldn't let them. Which I understand because generally a refund cannot be processed to a debit card. I sent my banking details as requested. To this day, dololo refund. I have emailed, I have called, I have tweeted. They just ignore all kinds of communication. Worst experience ever from such a huge retail. And this is why Woolworths will stay winning