Dear Telkom, please help me change a debit order

<p>Hi there, there's a Telkom account that I pay for through debit order. I'd like to change the name and account of the person paying the bill as I no longer wish to pay this bill. I cannot find any forms on your site which help me in this regard. Could you kindly help. Also a debit order of R1000 left my account in February. I wish to query this amount, request a refund and have the new person who's going to take over the debit order asked to pay for that amount. Thanks for your time.</p>