Uncommunicated delays, having to follow-up, received half my order, and "technical issues"

Placed an order on 27 Sep 2021 with delivery confirmed between 8 and 15 Oct 2021. On 15 October I have not even received a tracking number yet so I followed up. I was told that there was a shipment delay but that it would be delivered on 21 Oct 2021. At this point I'm still quite understanding - but would have liked to be notified of the delay instead of me having to follow up.

On 18 Oct I received a tracking number and the details of the courier with a note saying that it may take up to 24 hours for the courier to book the parcel into their hub. 3 days later, on 21 October (the day I was told I would receive my order) I followed up again because there hasn't been any shipment / delivery updates on the courier's site and on Cable5's side it still showed 'Pending'. With no response to my follow-up mail, 6 minutes later the status suddenly updated, the courier has my parcel and everything is in order. The following day the courier delivered my order - I was so excited and relieved! I opened the package... Only 1 of the 2 items I ordered has been delivered. At this point I was quite frustrated - how difficult can it be to ensure that I receive everything I ordered? So I phoned to notify them... Response: "I'd have to call you back because we're currently experiencing technical issues". Now I'm waiting for my call to be returned so that I can find out if I'm going to receive the other item I ordered or if I'll be refunded.

Uncommunicated delays, constantly having to follow-up, receiving only half my order, and then having "technical issues" on top of it - these are the reasons I will not be ordering from Cable5 again.