Dear Ms  Hasan

I have been trying to contact you numnerous time but I have been unable to get through to you.  I have also left voice mails requesting a call back but I have bot been contacted by you hence this letter.

I need to speak to you urgently so please contact me on   .............     as soon as you get this letter.

If you have any queries in relation to this, please contact me or the Customer Care line on the number provided below.

Yours sincerely

Dear Ms  Hasan

I have been trying to contact you numnerous time but I have been unable to get through to you.  I have also left voice mails requesting a call back but I have bot been contacted by you hence this letter.

Sevgili Hasan Bey,

Uzun zamandır sizinle irtibat kurmaya çalışıyor ancak size ulaşamıyorum. Beni aramanız için sesli mesaj bile bıraktım ama size ulaşamadım. Ta ki; bu mektuba kadar.

I need to speak to you urgently so please contact me on   .............     as soon as you get this letter.

Sizinle acil olarak konuşmam gerek. Lütfen, bu mektubu alır almaz beni bu numaradan arayın.

If you have any queries in relation to this, please contact me or the Customer Care line on the number provided below.

Yours sincerely

Konuyla ilgili herhangi bir sorunuz olursa, benimle ya da aşağıda belirtilen numaradan müşteri hizmetleriyle irtibata geçin lütfen. 

Saygılarımla.

This is very useful. Thanks so much Harpoon

You are welcome.