Slow to NO service

What terrible service from Wesbank Vehicle Finance. I have settled my account on Monday (early morning) already. I've sent proof of payments to requested email address 3 times since then! No response since, even though its been 3 days. All I want to do is to confirm the address where my Natis documents should be sent etc., but no one even acknowledges the payment made. I've tried calling the call center multiple times since then as well, each time holding on for 20 - 30 minutes. Got through now, spoke to someone (after holding for 20 minutes), and the line cut off. She didn't even call me back, even though I've spent almost R250 on airtime just trying to get through. No one responds to emails, and you cannot get through to the call center, so what must one do? So disappointed as I've only heard good things about Wesbank.