Anyone with a similar problem?

At the point of purchase I questioned the supplier if they qualified their batteries specifications. However the batteries were delivered very quickly without a reply. It was only discovered when used on a 4 hour Load Shedding Cycle that these batteries as new only lasted +-2H20 Minutes. The advertised rating is 59 AH over 10 Hours = 5.9 amps x 10 Hours. My UPS Inverter uses 2.9 amps and as such should last for at least 18 hours. However when discharged to the minimum 11 Volt Safety Value only lasted +-2H20M at best. This is only around 12.5% of the advertised capacity and about -8x less than expected. Or Less than 80% what should be achieved and severely under performing as a brand new battery for R1200 each x2 + R480 for delivery. All emails further to performance questions have been ignored or not rep**** to.