You can't complain about the increase in fees now as by paying the new fee for three months you are deemed to have accepted it.
You can complain about the reduction in amenities, though.
Before you contact them check your terms and conditions. I looked online and it states that facilities may be withdrawn when necessary for maintenance but yours might be different.
Then you need to be sure you know what you want before you contact them. It would be reasonable for you to cancel the contract without penalty due to these changes.
You might prefer them to reduce the fees for six months.
Know what you want, be firm but polite and deal with it as soon as possible.