Poor quality batteries and worst service

Would like to review Gaan Industries as a business supplying batteries. I purchased 2 Deltec AGM batteries on the recommendation from Gaan Industries that these batteries are ideal for a small solar setups. The warrantee that was provided was 6 months as per the invoice received. Unfortunately the batteries only functioned normal for 2 months then stared to drain rapidly under load. I made contact with Gaan Industries to enquire about the warrantee, and the advise received was to return the batteries so that they can be returned to the supplier for testing etc. To cut a long story short, it has been close to 2 months where i have been following up with Gaan Industries as regular as possible. No concrete feedback have been received, Gaan Industries are constant blaming the supplier on how bad Deltec is on any warrantee claims. Why would Gaan Industries even recommend a customer to buy the batteries by knowing the issues they have been experiencing with the supplier. Unfortunately the service and feedback received thus from Gaan Industries have been terrible. I will strongly recommend to do your home work before buying a battery from Gaan Industries.