"struggling to get repeat prescriptions!"

I have been told by a specialist that the medication I need is so important yet I have had problems everytime my repeat prescription is due. With the pharmacy blaming my doctors surgery and vice versa. I called up today and tried to explain my circumstances and was basically left with no help or support and when I asked to speak to somebody in charge I was told the person I was getting no help off was in fact in charge. Iam very disappointed with the care and support I'am receiving but Iam not sure how to go about it. I honestly feel like giving up on my entire treatment as it is causing me to much stress as I keep hitting a brick wall and my health is suffering due to not being able to get vital medication that the doctors say I need. I would like to say that the care I have received from the doctor who has been treating me has been exceptional and I'am very happy it's just the after care or lack of it should I say.