Telkom doesn't respond

I have send 5 emails to ********** since 11 March 2018

My e-mails have been completely ignored recently I got an undeliverable request as well (probably from Telkom's mailbox thats too full)

When I talk to contact centre agent, they just give the same email address to send the cancellation request to.

I am so frustrated, as there isn't a Telkom shop nearby, I need to do this via email or phone.

Telkom is quick to get you on board with their mobile deals, but their after sales support is non-existent!