hello to all

yesterday i landed at don mueng with my fifth tourist visa obtained at vientiane. the fifth was stamped with a remark that this was my last tourist visa. A don mueang immigration did not want to let me go. After long discussion the reponsible asked me to buy a plane ticket out of thailand no later than November 30 is just 30 days. in the end I left with my passport stamp until December 31 is my 60 days visa .... my questions are so do you think I can stay until December 31 and then extend my passport to 30 days cheang watthana and then do 2 visas run? and then, with a new passport, could I do it again or does immigration have my history in mind?

Thank you