looked up my amazon history and this is the one i got
of course this is useless to you because its out of stock.
https://www.amazon.com/gp/product/B00O0WOME4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This is the brush i use:

AtEase Accents Double Sided Dog Brush - for Long or Short Haired Dogs and Cats Natural Bamboo Eco Friendly Pet Grooming Dual Sided Pin and Bristles for Deshedding Hair https://smile.amazon.com/dp/B01M7Z063X/ref=cm_sw_r_cp_api_glt_i_0038KQGQEQK9432PZZQM?_encoding=UTF8&psc=1

I also use this for when my wheaten is matted:

Andis Premium Firm Slicker Brush,... https://www.amazon.com/dp/B00O0WOME4?ref=ppx_pop_mob_ap_share

I always spray him down with detangler first. I use this one:

BioSilk for Dogs Silk Therapy... https://www.amazon.com/dp/B01330IKAA?ref=ppx_pop_mob_ap_share

Keep at it. The most important thing to do Is to get your dog used to being brushed. My guys five now and he will sit while I brush him patiently, although I still don’t think he’s happy about it