Inverter problems with GEEWIZ

I ordered Geewiz 2400VA Inverter Trolley + 2x 100AH LITHIUM Batteries on 2023/02/03 and they informed me that due to demand there was waiting period of up to 8 weeks, On 12 March I received it, plugged it in to to load the batteries overnight. The next morning when I wanted to use it it did not switch on. They eventually requested me to return it and it was replaced with another unit. I used it for a few weeks and it also had a problem. I returned it and they said they would repair it. Today it was returned but I only received the control box without the battery pack, U am trying to run a business from home and mitigate load shedding but I am afraid Geewiz cannot deliver.