Bad Service

I made an online purchased a Sealy Tivoli pillow top, and an Edblo Milan bed set on the 4th June 2020. On both the beds, you can actually feel the springs. We made a formal complaint at the Southgate branch in Oct regarding the defected beds. The Bravo group/ sleepmaster contacted me and authorized an exchange. After many calls and emails, Hi Fi Corp has promised to pick up the beds and process a refund. Eventually on the 02 Dec they picked up the Sealy, now I have to practically beg them again to pick up the Edblo and process my refund. sent many mails to them, but no one is answering. Please help. I am beginning to wonder if the online purchase from Hi FI Corp is a ****. How do I ensure that that I get my money back asap? They are ********* and unreliable.