Many of us have experienced this with Gigspot - and a fair number of other issues as well....
I handled it like this: I wrote down all the MSC's that use Gigspot. I then emailed the Gigspot admin team and asked to be removed. I then made sure I was registered with all the MSC's through their Shopmetrics pages. I have never regretted this.
Hard work builds character and homework is good for your soul.