Pathetic service from Rain service provider

Two weeks ago I logged a complaint with Rain regarding my signal constantly dropping even when using an outdoor antenna which cost me another R500. They have not called me back nor bothered to email me. They have no support line. Only when I tried to sign up to a new 5G router did they call me and promise me that tech support would call me back (which they didn't. So if you want their attention, you need to go on their site and try to sign up for something new before they would even consider calling you back. The signal was steady for a while at around 7 Mbps, but in the last month it has been hovering at below 1.7 Mbps and sometimes below 1 Mbps. This is on supposed 4g. Pathetic sub par service from a service provider that is overburdened on bandwidth and refuses to admit to their customers that they bit off more than they can chew.