False advertising

I am a facilitator and regularly need to facilitate sessions online via Zoom or Teams etc. Every call I have drops. I constantly get messages to say 'my internet is unstable'. Zoom crashes regularly. We are paying for a 50MB line and yet the max I have ever seen is 20MB. Right now it is 12.2 download and 4.37 upload. Maybe I do not understand how this works, but to me you can't claim you are getting a 50MB line when it never goes above 20MB. They claim we need an extender. We have two and that has not really helped. We then found out from MyownISP it has to be an extender from them directly to match the router. I can't see how this will change the speed at all. I never had this issue at all with Afrihost. If you are required to do a lot of work with video on Zoom etc, i would not recommend MyownISP.