Payment made

Just received an automated email from Vodacom, email address [Email Removed] with attachment saying I must pay my account within 7 days and proof of payment must be sent via fax to number listed below. first off I have paid my account, secondly there is no fax number on the letter you sent even though on the letter it says there is a fax number available. can I please have this fax number so I can sent the proof of payment. thank you