Make Sure what you agree to

I started a contractual agreement with Webafrica on the 16 February 2024. Throughout these 2 years, I have experienced various problems with their services and connectivity, I have upped my internet speed line, to 200 up and 200 down, a month because of work. They have given me a router and I have been in a contractual agreement for 2 years, now that I have canceled their services, these new terms and conditions came out, that was revised. ( Free to use router, and needs to go back to them, delivered or couriered, and if you do not give back the router another R999, and then Termination Fee R999) after 2 years? Then I asked them please send me the agreement that I signed, they said it was done over the phone and I must go and read their terms and conditions on their website, I would say get more quotes, know what you take on. I have to say that there is really nice people on the helpline that assisted me, and I am thankful for that, but know what you sign up for.