I'd offer the SAT CRR assistance, ask if he/she would like to borrow your map book to make copies, ask if they have questions to call(you don't need to answer...)
Then go to your OPS manager, and say: (of course only do this if you genuinely feel the CRR is falsifying)
"I think CRR is really struggling on SAT, I've offered my maps and cell number, but CRR is still bringing back lots of DEX packages, I'm concerned for our stations 'service levels' "
^this makes you look "concerned" for the right reasons, not just because you loathe the extra work on Mondays.
Best of luck..
And of course if this doesn't work, and this CRR uses your vehicle on SAT, make sure to leave the tank empty-ish out of spite on Fridays...