Debiting my account even after cancelation

I have requested Telkom to cancel my router and contract which i ordered since the router did not arrive. I called their call center and i was told that when the courier eventually arrives, i should not accept the router which will automatically translate to the router contract being cancelled however, today i found a debit order of R619 was deducted by telkom from my account. What is it for cause i did not receive any services from Telkom. Please cancel this or i will report you with the ombudsman.