I have just purchased a new Neilpryde 460 SDM mast. after using it for the third time I cant get it apart. I have had five guys pulling and twisting it with two booms attached to it. it moved about five cm, but now is totally stuck. I have tried a list of ways to separate it but haven't had any luck at all. I have tried pulling it apart with a turn buckle, using boiling water flushing it out with water, hitting it with a rubber hammer but nothing.

can anyone give me any advise

Thanks.