Simple Settlement Letter took more than 3 days

I called in to this number *** since Monday to ask for a settlement Letter. Lady I first spoke to was very nice, gave me the amount that needs to be settled and explained process and I have been awaiting for the letter since than....Clearly I cant settle without all relevant info like bank details and all.<br> I follow up the Tuesday, still no letter. Wednesday same thing instead I just had to dial more than 4 times and their line kept cutting off. I leaver message with switchboard to get someone to return my call nothing till today. I try again Today being a Thursday, I still get no service...<br> What would it take for me to get a simple settlement letter. Instead they were quick to send me reminder sms after that for payment....