Great Eastern Appliances — I'm complaining about service

.. I purchased a gyser on 31st october. We were told that it will installed by today (2nd november). We also got a call for that we were assured today only it will be installed, but now it's over 6:30pm, no one came neither it's placed. I have called in the branch twice, they gave us another date. Now my question is, if we are assured of our appliances get installed within 48hrs. Then what for we will call the person for a number of times? What kinda service is this!! I don't feel to buy anything further from this company,,