Here’s a polished and professional redraft of your feedback:
The check-in process was very brief and considering It was Canary Wharf aimed at business customers, lacked any questions about whether I had a car or if I was on a business trip and required additional services.
The Spa experience was particularly disappointing. One of the main reasons I booked was to enjoy the Spa before work the following day. At no point was I informed at reception or in the Spa that hotel guests needed to bring their own towels. Towels, gowns, and flip-flops are apparently only provided to treatment guests, not general hotel guests. I asked for a towel once I was in my swimwear, but then had to change back to retrieve a towel as I was declined one.
Additionally, there were three showers in the Spa: the middle one was out of order, and the other two had no shampoo, conditioner, or shower gel. I had to run to the middle shower, squirt some product, and return to the others to shower. Later, I asked reception to replace the towel in my bedroom I had used at the Spa, as it was very wet, but this had not been done when I returned that evening. The night manager, however, was more helpful, explaining where I could charge my car and catch the shuttle to Canary Wharf.
Finally, the room I booked was for four people, but only three towels and gowns were provided.
Overall, the Spa and room amenities fell short of expectations and were not communicated clearly, which negatively affected my experience.