Ryobi CLD-1860K Lithium Ion Drive Drill Kit (18v)

bought a Ryobi CLD-1860K Lithium Ion Drive Drill Kit (18v) for R2400,00 got a problem with the battery not lasting for more than 40min took it back to builders bloemfontein Ryobi Agents come to look and they say the battery amps is too low i must buy a stronger battery.first of all it cost in the access of 800-900 for 1 battery it got 2, WHY do you sell a kit with inferior battery capacity Do Ryobi think it is an ornament? i could have bought another make of drill for way less, as well as everything in the kit is cheap made the drill is feeling cheap and the paint already comes off for a thing that been used for 2 weeks it already looks like it been 3 years old very unhappy and it is still at builders dont even want to collect is it was great disappointment my 5 year old black and Decker outlast it 10 to 1