Well did you break the pump accidently, if so then it's down to you to replace the pump at your own cost or via the ins you should have taken out for the pump. If it has just cracked then it should be replaced, talk to your hospital team. This is if you are in the UK though.
Suspect you are not so what country are you in and how old is the pump?
You need to give more detail as to how and where you got the pump from and who pays for the supplies for it.