Refusal to pay Levies paid to them to new agency

Complex: Hawthorn Mews within Hawthorn Village in Fourways. The owners of the complex were paying Levies to Hummingbird, after a new agency EEM took over the management of the complex, Hummingbird is refusing to pay Levies paid to them to the new management company EEM. EEM is telling me as an owner of the unit that it is not their problem. I have called Crowther and emailed him my bank statements reflecting payments and he just ignores me. On the phone he promises to sort it out but its been over a year now and no action. I now need to seek legal assistance and the cost for them is more than the money being owed by the company which puts me in a compromised position. This is unethical behaviour by a company and should not carry on like this. I would like other owners of other complexes to be aware of this company and the manner in which it is treating its so called customers and reconsider making use of them to manage their complexes.