Communication is terrible. Tennis lesson cancelled due to Belsonic event at Ozone. Not communicated. No direct telephone line to centre. It took me a long time to find a phone number and then try numerous options before being able to speak to anyone.Swimming- impossible trying to change time of Swimming lessons.. customers should be able to do this themselves online.Olympia leisure centre- the Swimming changing facilities - people are "reserving" changing rooms and leaving belongings in changing rooms. This is escalating..I have counted the number of free changing rooms and one week there were 9. All the family changing rooms are hogged for lengthy periods. I attend with four children and there is rarely a free family changing room. I have on occasion used changing rooms with belongs left in them and I am in and out before these self people return.. the leisure centre needs to start removing items left because it is making the facilities unable.. totally unnecessary and selfish behaviour