Bad Service to a loyal customer

Extremely bad service. I have spent 1000's of rands in your shop. Very regular and loyal customer, unfortunately, the same can't be said about your shop anymore. I purchased a set of batteries one of your guys suggested. Explained by him how to charge and discharge, (not the 1st time I buy new batteries – I KNOW how it works) the batteries is faulty. Went back with the batteries, they tried all sorts of technical BS just not to exchange the batteries. Even tried to tell me my device is faulty, must charge in a normal charger, bought one from them at R180 ( total rip-off, as I saw the exact same charger in another shop for R60) Used ONLY this charger, batteries is even worse than they were. Popped in this morning to buy some coils and Juice, and told the same guy about it, but to no avail. Got VERY rude, and extremely unprofessional. I for one, will NEVER spend a cent in your shop again, and do advice people to think twice before buying batteries from them.