Thrifty, good luck and plesae keep us informed of your progress.
The National Consumer Agency published a report last October entitled “Management Fees & Service Charges Levied on Owners of Properties in Multi-unit dwellings”. It’s a lengthy report (104 pages!) but worth a read.
The key to dealing with this issue imho is to read and understand the Management Agreement you signed on purchase together with the Companies Articles & Memorandum of Association (Memorandum in particular). Once you are armed with this information, it is up to you to ensure that both documents are strictly adhered to.
(Note: I will send you a PM with additional information too lenghty to post here)