Need help from avoidant-experts

Hi!

So my avoidant ex/friend and I haven't been in touch for three weeks. Last time we saw each other (around three weeks ago) everything was great, but the day after we were texting and he said something rude, I answered that I didn't like this type of jokes directed at me, and he said that I should be more easygoing. I answered with an example of when he had asked me to take his feelings into consideration and I did so without telling him to become more easygoing. He went into a silent mode, and so did I.

One week ago he called, but I was busy and didn't pick up. None one us called back or texted back.

My question is this: when we were on good terms he offered to help (not me directly but in a common cause we both are involved in) and now his help is needed. Should I text him and ask if his help is still available? How will it potentially be taken?

Thank you!