Standard bank ********ly bloccked our business account.

We have been with standard bank for over 8 years. A perfect history in my opinion. Our account was blocked by standard bank without any valid reason or prior notice. Standard bank has not come back to me to explain why they did this. Nor have they indicated how they would prevent this from happening in future. UNless i get a call from a senior standard bank business manager, I will be forced to clsoe my account. I will also go to every social media website and explain the hell standard bank put me through