I would not pay $125/week for internet service. With Digicel, you can buy a mifi and a pretty decent amount of data for less than that. Once you have the mifi, you can get a good amount of data for around $50.

To the OP. I would go to the Digicel store in Road Town, but that's me and I have never been to the authorized retailer in West End. I just have found you are usually best off going straight to the service provider. The West End store may be great though, for all I know.