Turbo wastegate

I have a 2010 GTI, car has 112k on it. In good shape. The waste-gate rattles, from what I hear it’s almost impossible to fix, I was wondering if I got a blowoff valve if that would fix it, or if I could permanently shut the waste-gate and it would be fine? I’m not a mechanic, this is my first turbocharged Vehicle, please educate me!