Repair a data collecting software

Hello. I have a software which collecting data about hotel bookings etc. from booking dot com website. The software became unstable (crashing after some time of work) and have some minor bugs, issues which should be fixed. Looking for freelancer who is able to fix these issues and make this software working properly, possible long term cooperation if everything works fine. I will not release milestone before i'm 100% sure this software works. But if works, I will give a bonus too. To prove that you read this, please answer in the beginning of your proposal 2+3-4=? Any freelancer who promise, take software and disappear will have hidden bid and will be reported. It's urgent, so i need really serious people here. Thank you and looking forward to work with you.