Frnt brake pads and rotors replaced twice. After day grinding noise on slow stop on 2004 Volvo S80

Replaced both twice in a month. Still noise after a couple days, but not all the time and no difference hot or cold

3 answers
What grade of pads and rotors are being used? sometimes pad material that does not 'match' rotor type will make noise due to certain friction characteristics , and would be normal. Have you tried OEM Volvo parts?
I agree with ziptie's comments...use Volvo parts and this will not be an issue...with the right aftermarket parts it should be OK, but it doesn't sound like these are the right ones...go for OEM
return for warranty work something is very wrong. poss caliper is sticking or worse