Black and decker drill faulty

I purchased a black and decker drilling machine from makro on the 25th November 2016. 10 months later the drill goes faulty with the gears/ gearbox being the issue. When I returned it well within the warranty period I was told the damage was not covered!!! How can the most important part of the drill not be covered? I found this feedback utterly disgusting and unprofessional from Makro. It seems they have got a third party repairer to make assumptions on the repairs. I was told there were exclusions in the warranty which I have not found to be valid. So my question is how can a large retailer fabricate cheap excuses to get out of a warranty claim at the expense of a customer? I have not yet collected the item as I will now escalate to the ombudsman for further action.