Useless and ***********

My wife has been trying to cancel her 24 month contract since April. You can't call them as they simply don't answer, You can't email them because they can't read. What do you expect from a person? I called Vodacom to cancel my 24 month subscription and they emailed a cancellation letter immediately. Could only obtain one reference number: ***. She has sent the cancellation letter (signed) including a copy of her ID as requested, more than once. No feedback.