FICA DEPARTMENT NIGHTMARE

I have been harassed by FNB's FICA department for weeks now via SMS and email. Despite me sending the requested form now 4 times, calling their offices twice and sending several emails, they are still sending me the same messages over and over. Their website do not allow either compliments of complaints as the function is disabled. Even the mobile APP does not allow a complaint "due to some error" Requests for a competent person to contact me to resolve, remains unanswered.