loan terms increased without informing the client

I bought a house last year 2019 for a 20 years term which was 240 months via nedbank and my first instalment was in September 2019. in 2020 April I app**** for a payment break due to covid 19, that was a 5 months payment break, it ended in September 2020. In September I started receiving a new term of 250 months so that means the 7 months that I paid for my, they added extra 10 months to make it 251 months which I did not agree with and I did not sign for it. Please Hello Peter help me to reduce this to a legal home loan term of 240 months. Because this is not what I have signed for, and it is ********* behaviour and unconstitutional in terms of NCR. This is not the only thing nedbank has done they increased my credit card limit without my approval.