bad bad products - bad bad customer service - do not answer email or phone

Hi I bought two vacuums - the one wet/dry one from Builders and the 2000 watt from Makro . They both start and then stop. I took the one back to Builders and they gave me my money back. Makro refused and said they must send it for repairs - as it was over the Xmas period - I kept it until I could send it in. I have tried calling the customer care line - we hold on for 20 minutes each time - I have mailed countless times - why must I have it repaired when it is not even 3 weeks old when I tried to return it for a new one>>>>>>>>>>>>>>>>>>>>