We stayed for one night as we had tickets for Spir...

We stayed for one night as we had tickets for Spirit of Christmas at London Olympia.
I requested a quite room at booking we were on the fifth floor. There was a dull humming sound throughout the night sounded like a generator and I could hear the guest TV word for word, this went on until past midnight that I was aware of.
I called Housekeeping to request two extra pillow, I called three times. On the second call to enquire about them the female staff member verbally interrupted my enquiry by saying "there on the way" it took one and half hours before we received them.
The bed was comfortable. Unfortunately, the room is tired and dated with stains on the writing desk, hairs on the bathroom floor and wear and tear on the bathroom mirror.
Breakfast at 8 a.m. was busy and noisy however, we were seated quickly and there was a good selection of items and our tea/coffee was served quickly and a top up offered.
On check out I informed reception of Housekeeping very slow service they apologised and informed me a group were in. As a guest this is of no concern to me, Housekeeping would have been aware of occupancy levels and should have ensured adequate staffing.
Very disappointing for a four star hotel I would not stay again or recommend it.