Any IBM employee adversely impacted by the relocation to regional offices should reach out to a manager. Oftentimes at IBM an issue can be resolved simply by contacting the manager of the IBMer carrying out this undesired action.
IBM managers never side with their employees in these types of situations and therefore you should contact a supervisor and have the relocation rescinded, thus allowing you to continue working from a home office. You need to exploit this loophole. Talk to a manager, even if it means contacting someone several levels above: it could save your job.