Verdiğiniz taahhüt gereği Üç gün içinde X'e olan borcunuzun ilk taksiti olan X YTL'sını ödemediğiniz takdirde haciz işlemlerine devam olunacaktır.
Title
In accordance with the contract that you gave,....
In accordance with the contract that you gave, distraint processes will be continued if you won't pay X YTL in 3 days, which is the first installment of your debt to X.
Remarks about the translation
David: Distraint is a process whereby HM Revenue and Customs may take some of your possessions for sale at auction towards settlement of an unpaid tax bill.