Faulty electrical applience

Hi. My mother bought a blender at @Home about 3 or 4 months back. We used the machine to make a strawberry puree for banking the first time and the machine worked. We used it for the second time about a month later and the blender was not working. It turns on but does not blend. We took the machine back and we were told that we should have brought it back within 7 days. We were told there's nothing the store can do, that they would phone the manufacturer n get back to us with feedback. It has been a long while now and we have not received any feedback from the store. Please note that we are staying 4 hours (return) from the branch n cannot afford to make visits to query this further. No effort was made to assist us with this faulty machine, unfortunately we did not realise within 7 days that there is a problem with the machine since we were not using it daily.