Will

I wanted to update my will recently so I contact bank and everything went well with the bank updating everything. Problem now was that I had to get the will witnessed at bank because I did not want my colleagues to see the will. I go to bank I think they have professionals there and I will not have comeback. Now they say everything was not signed properly. Now why is this my problem? They say my will is invalid and have to restart the process again. Problem is that I don't have time to do this. I cannot sacrifice the time I spent there. This is not right