top I wonder if your contract had the following two clauses.If so you have a viable action in court.The downside is of course legal fees.Good luck to you
(a) Consolidation, Merger and Sale. Before conversion of this Convertible Note into Company Common Stock, without the consent of Convertible Note holders representing a majority of the principal of the Convertible Notes then outstanding, the Company will not (i) consolidate or merge with or into (or permit any subsidiary to consolidate or merge with or into) any other person or (ii) sell or otherwise dispose of (or permit any subsidiary to sell or otherwise dispose of) a material portion of its property or assets in one or more transactions to, any other person or entity or enter into (or permit any subsidiary to enter into) an agreement with respect to any of the foregoing.
(b) No Dilution or Impairment. Without the advance written consent of the Payee, the Company will not by amendment of its Certificate of Incorporation or Bylaws, each as amended to date, or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms of this Convertible Note, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all such action as may be necessary or appropriate in order to protect the rights of the holder of this Convertible Note against dilution or other impairment.