Consistently Bad Service at Silver Morris Midas

In January I bought a battery from the Siler Morris Midas, the said battery is still under warranty. The batter has for the last 2 months needed to be charged every night and will go flat if the car is idle for 12 hours. I went back to the store to request assistance as the batter was still under warranty and was advised by the store assistant that I could not be assisted as many people are having similar problems due to not using their vehicles during the lockdown, which is not the case with me, as I still use my vehicle for same amount of time. The Store assistant, Sizani, told me that I simply had to charge the batter every night to ensure that I could use the vehicle the following day. This is a new battery. The vehicle has been used regularly over the last couple of months. This battery is under warranty, why am I not able to get it changed or serviced. This is not the first time I have received such poor service from Sizani at Silver Morris Midas. He is extremely unhelpful, arrogant and rude. He does not try to assist and is very quick to usher one off. I need assistance with the battery. I cannot charge it every night, please can you assist. The service at this store is really bad, the staff make one feel as though they are doing you a favor and are not willing to assist with after sales service on any of their products. I do not recommend this store to any.