Not getting advertised WiFi

[JHaze1]

We are on the 500mb package, we have a PlayStation hardwired in and was getting 450+ download a few weeks ago nothing has changed in the house and now we are only get 80 download and it is actually quicker not being hard wired at 80 download on the WiFi which is nowhere near what we are paying for. If it had never been that fast I would think we didn't have the capability but it was fine about 3 weeks ago