Firstshop... "Customer comes last"

It amazes me that their opening statement is "Customer comes first"... I don't even think 1 star is justified. I ordered 6 ink bottles for an Epson printer on 07/12/2023 and was informed that the order would be split over 3 deliveries. I received the first 2 deliveries over a period of about 4 days. I am now short of 1 bottle from the paid order. It is approx. 1 month, 8 calls to different consultants and 3 emails... And the only logical "excuse" is that the courier hasn't issued a tracking number or we await feedback from the couriers... What a waste and frustration dealing with a company that can't deliver on its basic promise of "customer comes 1st"