Formal letter Dear Sir or Madam, I am writing to complain about an incident that took place this months. The incident has caused me a great deal of incovenience. The last day, on Monday to be exact, I received a letter with my receipt, I could check that you company has been overcharging me by £100 my services. I contacted my provider yesterday and they informed me that they could see no reason why the receipt has overcharging £100 over my services. They then informed me that they couldn't offer me a solution. I am very disappointed with the treatment I have received from your company, I need a solution urgently. I am a university student and I cannot afford that amount of money so I demand that verify my receipt. If I do not hear from you in the next 14 days. I shall be foced to considerer refer the matter to legal counsel. I look forward to hearing from you very soon. Yours faithfully, Anna Squire.