Online Order not delivered

I am not satisfied at all for a first time user using the online service delivery. I ordered 2x camping chairs on 27 November 2020. When I checked yesterday afternoon, it stated that my order has been delivered. But I checked reception at work and absolutely everywhere, but I haven't received my parcel. I called and the telephone operator said they will escalate the matter and call me back. I also asked who signed off on the delivery, the operator couldn't answer me. I phoned again this morning and was asked if I received my order. Clearly I have not received my order. They said they would escalate again. If I knew it would be such a hassle, I would have gone to one of the branches. Would appreciate urgent feedback or a refund. Thank you. Kind Regards