Terrible service

I bought a bed from Sleepmasters in May 2019, I started to experience problems with the bed and put in a complaint with the branch in February 2020. The branched advised me that head office needs to be consulted and they will lodge a complaint that an assessor can come look at the bed. instead they never assessed the bed, they came and exchanged mattresses. I then called the sales consultant explain what had happened and asking why? he advised me maybe i should request an exchange and take another bed - in May 2020 i went and paid the difference of the bed i wanted and the bed i have. Its been over a month and the beds have not been exchanged and every-time i call the branch theres nothing new they can tell me besides they are waiting on head office. i am at a point where i would want a refund on my so i cant go buy a bed somewhere else. disgusting servoce delivery. Im forever do follow ups with them.