This is using the MATLAB program that does the optimal design.

Don’t forget to normalize frequencies by dividing by fs/2.

You may have to “play” a bit to get a good filter design.

By the way when you are testing filters by putting signals through them,  make sure the input signal is long enough so you have some steady state behavior.  Note also that the length of the output will be longer than the input because of the convolution.   Make sure you align the time axis properly.  It would be nice to plot the idea result on the same graph as the output of the filter.