MWEB - Shocking Service!!

I’ve been an MWeb account holder since 1997, but their service has deteriorated to an appalling level! They have overcharged me by a substantial amount several months ago, and reaching their billing department is impossible. Every call gets cut off with a message saying, “We cannot take your call right now, please call back later.”

After repeated failed attempts, I had to resort to calling their sales department just to speak to someone with the hope they'll put me through to Billing. No success!