Poooor customer services

I am struggling for a fu*ing whole month to get a paid up letter from Nedbank and Hammond Pole Attorneys. I settled my personal loan account on the 30th April and have since tried to get the letter to no avail. HP attorneys never respond to emails or Whatsapp. Nedbank on the other hand also doesn't respond to my emails. This is bull****!!!! Please provide me with the letter!! My REF no is ***6