Funny story about my vodafone.es SIM card I bought last year. I used it for about 3 months while traveling in Europe and Turkey. I bought 8 GB for around 10 EUR

Funny story about my vodafone.es SIM card I bought last year. I used it for about 3 months while traveling in Europe and Turkey. I bought 8 GB for around 10 EUR, and didn't use nearly that much. I renewed that plan the following month, but due to some glitch in Vodafone's system, the same 10 EUR bought me 16 GB for the upcoming month. I renewed the following month, and my 10 EUR again bought me 32 GB! I hope I can reactivate that SIM when I go back to Europe, the monthly alotment should be up in the PBs by now.