Question Author
Indeed the box says 28 twice a day. I assumed that it was a typo and took two twice a day.
As said previously anyone with any sense wouldn't take 28 twice a day.
GP did not tell me the dosage over the phone as we got cut off, call was at the end of the day and in the end she text me to tell me my prescription would be sent to the pharmacy for collection.
Thanks to those who have helped.