Delivery delay of essential goods

I placed an order with HomeChoice for a blanket, duvet inner and pillows as well as a 2x duvet bedding set last month and I recieved an SMS today stating that the delivery of the goods will be delayed between 3-5 weeks when I have ordered essential goods. I don't understand why on the website it states between 5-10 days and now they have extended it even though it is essential goods. I tried calling customer service for an explanation however could not get through to them. To request payment they are efficient but to deliver on the goods they are delayed. Do not advertise if you cannot deliver and based on majority reviews your customer service is historically terrible.