Woolworths it's ******** people

I have paid woolworths store about 4yrs back. Since last year December the 17th been calling them requesting for a paid up letter. Sometimes the pick up the hone even tell me that they will email it within 5 working days but nothing till today. I'm calling almost every day because they transfer me non stop until they hang up. The sad part I'm using my money to call but this how they treat me as customer requesting a aid up letter that I have full right on since I have paid them in full. Woolworths it's ******** people I'm telling you