Used not to matter/didn't use to matter

[tufguy]

Hi guys,

Please check "In my previous organisation, our boss used to give us cases. We used to solve it on our own, we used to call a lot of places to get information. It used not to matter or didn't use to matter where we used to call, we just had to solve the cases"

 

[bhaisahab]

Either "used not to" or "didn't use to" would work for me.