Try:
DELETE DISTINCTROW FROM Ghesting kala
INNER JOIN buyer ON kala.buyer_codem = buyer.code_m_buyer
INNER JOIN Ghesting xxx ON buyer.code_m_buyer = xxx.fk_code_m_buyer
WHERE buyer.code_m_buyer = @code_m_buyer AND
xxx.ser_kala = kala.@ser_kala AND
xxx.status_pay = kala.@status_pay
But backup your DB FIRST as I have no idea of how your tables are organised or what data you want to delete and what you want to keep!