Ellies UPS is a ****

I am in total shock, so I bought an ellies UPS from makro in February,utilized it for 4months for 2 monitors only 8hours during the day and fast track to November the thing just bips.i then took it back to makro where I bought it and they said they would need to return it back only for ellies to call me today to say their battery last 3months...who pays so much money for this type of ****...I have been ****med because where in their packaging does it say their battery last 3months infact their packaging says their warranty is 12months...it is false advertising and therefore they are ****ming us..who pays over R8k for a UPS that only works 4months...MAKRO is also helping these people **** us its not fair and I want my money