Incompetence and poor service @ Makro Springfield!

We purchased a Hisense fridge from Makro, whilst still under warranty the water dispenser started leaking and as Hisense was unable to repair the issue they provided a credit to Makro Springfield. We went into the store (Feb) and filled in all the paper work, wasted alot of time with the salesman (Shane) who told us the fridge will be delivered in the week and we will actually be getting a cash refund as the fridge is currently on promo (28 Feb). Mid week he calls to say there is a delay and it will be delivered within 2 days. Thereafter I had to continuously call, only to be led on that there is a delay but it will be resolved. Eventually got hold of the makro buyer (Nondu) who said that she does not know why Shane told me this because she made it clear to him that they will not be getting stock! This being after 2 or 3 weeks of being led on. The store did not have stock of any suitable fridge in the same category at the same price as my credit. They then suggested I take a demo at a more expensive price then what I was supposed to be getting a brand new fridge at! Today I go to the store and the lady in returns (Pracilla) tells me that the 30 day credit period is expired and I should go immediately and choose another fridge or let them collect my fridge and thereafter come in for a refund. How did my credit expire within 30 days ? How is the fact that their sales team is useless my problem? So now I'm expected to let them first collect the fridge, have no time to choose another fridge from any other store before i receive the money to actually purchase a replacements! She was being insistent and continued to say that she cannot help me, I must go back to Hisense myself and ask for an extended credit period and any other issues I must take up with sales. Unfortunately the sales manager has been busy, could not see us while we were there twice today, did not take any of our calls all day. This is poor service from such a big company! After calling Hisense, I was told that Makro did not even send them the required paper work and that they don't know why makro would tell me that the credit expires after 30 days! Your employees obviously are unable to communicate with each other or provide customers with any satisfaction! I still have no resolution from Makro and I am quite tired of the run around that I have to go through despite spending the money at what's supposed to be a big reputable company.