Currently applying to a company that contracts through Amazon (applying to be a driver, would rather not say which company).

The interviewer would like to proceed with the onboarding process, drug screening, etc. During the interview, he mentioned the base pay was $18.50, but I would be starting at $20, since they will be making a transition to that base pay here soon.

This morning, I got a text from the recruiter congratulating me and letting me know I got the job, starting at $18.50. I mentioned that he said $20 the other day, to which he apologized and stated that it would be $20. I requested a written offer with the correct base pay stated, to which he responded "that's what the text message is for".

Other than being rude, will a text message really suffice for a written offer, in case things go stale, or should I be pushing for a written offer/rescind my interest altogether? Thank you in advance, and I apologize if this isn't the correct sub