5 days doctors Prescriptions validity - Consumer Complaint for Mercury Drug - HEAD OFFICE

Hi Good day, i just want to clarify issues regarding Doctor's prescriptions validity. i went to Mercury branch in Moncada Tarlac to buy some medicine with me is my complete doctors prescriptions, is it true that doctors prescription is only valid for 5 days..? to my disappointment they didn't allow me to purchase my medicine which i needed that day, including my Highblood maintenance, my prescription medicine was dated only last nov. 28, 2020. do we really need to get doctors prescription every 5 days just for this mercury branch in moncada to allow as to purchase our needed medicine, as we all now going to the doctors clinic now a days is very risky. This is not the only time that we have encountered this kind of incident even my senior citizen parents who also went there to purchase their Highblood maintenance were not entertain by this branch just because they asking for a 5 days valid prescription. Kindly enlighten us if it is correct... also i just want to know if all mercury branches has this rule, cause on the same day i went to another mercury branch and they allow me to buy my medicine. can you please look on this issue and give me feedback asap. Thank You