Credit Boost and Repair

When me and my wife applied for mortgage we were approved for 5,75%mortgage rate . My score was 660 . My friend told me to go this Credit repair guys . I was skeptical , but what can I loose ? Nothing much . Listen to this . You know that mortgage underwriters reviewing all package of documents and requesting new ones for 3-4 month , no less . So by 4th month my credit score was fixed to 740 !!!!!!!! So with this score I can go anywhere and request mortgage rates lower than 5,75% !!!!! After talking to my mortgage broker and negotiation my interest dropped to 4% .......
do the math over 30 years I would pay $85000 less in interest !!! $230 less a month and $2700 a year .
It’s a free vacation that falls on my laps from the sky .
I paid for my credit repair less than $600 . Unbelievable !!!!!!