Advice From Experienced Member Needed

Hi
I need to ask whether my planned actions now will negatively affect my plans.
In short, I have 2 CCs, one with a £10k balance, and the other with £7k, as well as a mortgage of £116k.
I planned to stop paying the CCs this month, wait for the correspondence and then send the letters available on this site. In the meantime, I will continue paying the mortgage until I have researched how to challenge it successfully.
Based on research I've been doing, challenging a mortgage is harder because of the amount, as well as the fact that there is a 3rd party involved, the land registry. But based on what I was reading and watching yesterday, this process will be long and drawn out.
I want to ask someone who is more experienced whether stopping payment of the CCs now can affect my plan to change my legal status.
Thanks in advance.
I need to ask whether my planned actions now will negatively affect my plans.
In short, I have 2 CCs, one with a £10k balance, and the other with £7k, as well as a mortgage of £116k.
I planned to stop paying the CCs this month, wait for the correspondence and then send the letters available on this site. In the meantime, I will continue paying the mortgage until I have researched how to challenge it successfully.
Based on research I've been doing, challenging a mortgage is harder because of the amount, as well as the fact that there is a 3rd party involved, the land registry. But based on what I was reading and watching yesterday, this process will be long and drawn out.
I want to ask someone who is more experienced whether stopping payment of the CCs now can affect my plan to change my legal status.
Thanks in advance.