"Unacceptable to prevent visits to elderly relative"

My father is 91, has a weak heart and kidney failure He has dementia and has fallen twice while in hospital and got a bleed on the brain from this. He has caught covid while in hospital. As a result Leighton Hospital are refusing to allow family visits. I haven't even been able to talk to him on the phone because the nurses cannot find the phone when I call. He does not know why he is there and what is going on. It is inhuman to refuse to allow visits in these circumstances. It has already been several days and is likely to be another week before he is discharged. I tried to call customer services but no one answered. It is time hospital acquired covid was not used as an excuse to prevent family visits from elderly vulnerable people.