Horrible return service!!!!

I bought a fridge online makro and the freezer side was not working I went back to the store to notify them, then they promised to come fetch it that week and replace it. They did not come and I went back to the store they told me my new fridge has arrived but they waiting for collection of the one that is in my possession. They have called me 3 times indicating a time for collection and they have not done so up to date. This is so annoying and unprofessional as my mom has to leave work so that she can attend them when they come to collect the fridge (if they will ever collect the fridge) yet they do not come. 2ndly having a fridge that does not work is very frustrating. What is the point of buying something if you do not need it??? This fridge transaction has really been frustrating while I thought getting new appliances was exciting. If I could I would prefer if they take back their fridge and give me my money if this is the kind of service I will be receiving with them!!!