Drive Dynamics

I booked a block of 15 lessons at the beginning of January and have still had nothing 4 months later. I have been allocated 5 different driving instructors and heard from none of them. I have informed them I would like a refund and was told I had to send an email to which I have waited a month for a reply and yet again had nothing! I booked these lessons a few days after finding out I was pregnant and am now over half way through my pregnancy and am no closer to driving lessons or a refund! Absolutely ridiculous!!