I got a business, clients asking for phone calls

I got a business, clients asking for phone calls So, i own a "company", but recently, i've got some new clients that want a personal 1:1 phone call with me, to talk about the service and make a deal, I always try to get them to text me as much as possible, but i'm pretty sure it wont be like this forever, any advice? I swear i'd be so happy to have phone calls with them, but i got 0 social skills due to my stutter, i never talk to people yet i managed to have a digital business throught text, it's kinda awesome, but honestly i can't keep it that way