Need HELP please

On Monday the 3rd of April 2023 I took my 12v-105AmH Enertec Deep Cycle battery that I bought at Outdoor Warehouse in Bloemfontein (on the 23 of August 2022) that was still under warrantee to the store and explained to the assistant that the battery is faulty as it does not load to its full capacity from my ‘smart charger’. In the past it was able to charge up to 13,7 V and currently it only charge up to a maximum of 12,9V. In the past I was able to use my inverter for up to 4hours + but now it only last for max 1hour and 40min. I was told that they can send the battery away and I then have to wait 4 to 6 weeks for it to be replaced. I can however have the battery checked at a battery dealer and present them (Outdoor Warehouse) with the test result. I did that and the test result specified the battery must be replaced. I took the test result back to the store where after the shop assistant phoned the battery representative who said he will collect the battery to test it himself. He said that will let me know the following day what his test result is. He then offered to lend me a battery as I am depended of a UPS system to conduct my business during load shedding, which I am very grateful of. The same afternoon I drove back to Outdoor Warehouse to collect the ‘loan-battery’. Back home I connected the ‘loan-battery’ to my system and my ‘smart charger’ indicated that the battery was fully charged at 13.7V. I used it that same day during load shedding without a problem for almost 2hours and 45min without a problem. After the power came back on again, it charged up to 13,7V again. This is a sure sign that my battery is definitely faulty. On Tuesday the 4th of April 2023 I waited the whole morning to hear what the result was of the test done by the representative but no one phoned me back. The afternoon I phoned Outdoor Warehouse to enquire about my battery and the assistant said that he will phone me back as he will phone and find out from the representative. No one phoned me back. On Wednesday the 5th of April 2023 (the afternoon) I again phoned Outdoor Warehouse and was told that the manager will phone me back as he is busy with a client. He did not. I phoned again and spoke to him and he said to me that he is trying to get hold of the representative after which he will phone me back. It is now 16h15 and I am still waiting. Outdoor Warehouse closes at 16h30.... I am also a member of four different Caravan and camping groups on Facebook and will , if this is not resolved in a professional business manner, post the above on the groups pages as well as sending my complain through to HelloPeter. Regards Dana Pienaar *** *** Bloemfontein