How do you deal with French tanks

[void1984]

Hi

I'm playing a German campaign and I have encounter French armour forces. I have tough time dealing with them.
My tanks with 3.7cm canon can scratch only once in a while and even that only on small distances. Their side armour isn't much thinner then frontal.
4.7cm PaK works good, but only below 500m and are still useless against Char B1 bis.
JPz I the same as above and it can zero on target it's usually destroyed with response.
Sometimes I am able to assault some of them with infantry (if playing against AI), but my infantry lacks any AT weapons.
I can buy a section of those expensive 8.8cm Flaks, but they help only on very open terrain. (And too many of them don't seem realistic as a support of infantry company)

So, any suggestions?