Increased subscription without my knowledge

Mweb has increased my monthly subscription without me being made aware for an additional amount of R200. When I check the statements it states promo ended but when I was signing up the internet package the sales consultant never discussed that with me. I have been trying to make contact with their contact centre instead you get placed on hold for over 30mins until your airtime runs out, secondly their chat services are not working when you trying to reach out to the. My line was not paid for only 3 days and they discounted the service only because they couldn't deducted the increased monthly subscription that I wasn't aware of or paying for the past couple months. I cannot escalated because.i am not getting anyone I can talk to on the phone with. Ive held to wait to speak with someone on the phone for the past 3 days until my airtime finishes daily.