Spaces invoicing after termination.

a colleague stopped using Spaces services. They then settled their bill, following which the services were cancelled. ON the app it was showing that membership was terminated. For a few months spaces/regus didn't send any invoices. A few months later a bill of R10K is sent without any of their services being used and with the services having being cancelled and showing on the app that it was cancelled. Now they are saying they want to collect money for services that were not rendered and for agreements that were terminated.