Poor customer service.

Ordered a inverter on the 28th of January 2023, Was waiting for an electrician to install the unit, after it was installed I noticed that the unit was not working so on the 6th of March I contacted inquiries. They told me to send the unit back to them and so I did and it was delivered to them on the 14th of March, they didn't send any updates regarding the inverter, they told me a month later to send a courier to collect the item and so I did. A week later I noticed that Courier Guy needs an order number to collect the item and this was after I had asked the customer support agent if the information I gave Courier Guy is correct. Keep in mind that all of this was at my own cost and it was my responsibility to arrange everything. The customer service is extremely poor, wouldn't recommend FirstShop to anyone. The customer service agent was supposed to send me the correct details to collect the unit and I'm still waiting.