Deloitte Adminstrator interview questions

A recruiter found me for this role, they were recruiting for a large project that was already underway. The interview process was calm, dealt with just one recruiter, who acted as an intermediary between Deloitte and myself.

The interview process was straightforward, what followed afterward has left me stunned. I was interviewed on 18th December, promised a call with the outcome and feedback on 19/20 December. I received an email on 20th December from the Cardiff office point of contacting asking if she could call me on 21st December, I replied in the affirmative. Until today I had not heard from Deloitte despite emailing Cardiff HR, my original telephone interviewer, Deloitte's HR Enquiry Dept. I also completed a questionnaire on my experience asking to be contacted. Today I received an email from Deloitte's HR Enquiry Dept with an attachment, an email that alleges to be from me that I had never written, saying that we had spoken which we had not. I cannot understand how a compay like Deloitte can tell such a stupid (and easily provable) lie.