Jean Kasem dropped by her attorney! claims she owes $500,000!

EXCLUSIVE

Jean Kasem just made another enemy -- her attorneys are cutting her off ... claiming she's a pain in the ass client who also happens owe them a ton of cash.

According to documents filed in Casey Kasem's conservatorship ... attorneys at Haney & Young are asking the court to relieve them as counsel for Jean, ASAP.

The lawyers claim Jean rarely responds to their emails -- and refuses to communicate by phone -- and worst of all ... she's racked up $500,000 in unpaid fees during her various legal battles.

In a letter to Jean, the firm says if she doesn't pay up ... the money's gonna come out of Casey's estate.

We've made calls to Jean, but she's not getting back to us either.