After a few extensions, those officers will speak to you in Thai and expect you to reply them in Thai as well. Else they won't give you extension anymore.
Just buy a ticket and go home. Try entering Thailand again next time.
Although there are rules on how many border run or entry by air, I believe there is also a clause stating "It is at the discretion of immigration officer to approve or deny entry to the particular applicant if he or she believes ..... ".