Pexi - Consumer Complaint for PEP STORES

I went to pep at woodstock(they said that's this is their store code 6268) to courier a parcel. The cashiers(one of them being Melissa) both said its offline and when we asked if they could use another way to render service they told us that pexi is affecting their system. We then asked to speak to the manager she also said the samething. Weird part is that other pep stores didn't have the same "problem". Also was told to go find out the store code for the pep I'll be sending the parcel to. As a customer how am I supposed to know pep store codes if pep workers also can't access that information because they told me they cant