This isn't a support forum- We are other users of the device just like you. If you need support, there is an email form.
That being said......
This is one of the most reliable drives on the market.... far more so than any Seagate i've ever come across....not to tell you what to do.....but thats not a choice I would make!
Do you have any kind of backup at all for this data? You should NEVER keep all your data in 1 place, regardless of who's drive you use.... hard drives are mechanical devices and subject to failure over time (3-5 year lifespans on average). If you don't have a backup, your risking everything you have on there.
Regarding your issue, it sounds more like a router issue than a drive issue. Try doing a full reboot of your router, checking for any conflicts, etc. -- Does your router have a firewall? If so try (VERY TEMPORARILY) putting the MBL in a DMZ or turning off the firewall- see if you are able to access it at that point. Same goes for any other network firewall.