Nexgard review: Return the amount on the first card and make sure the second card will work

I tried to use my card at the anamosa veterinary clinc in anamosa iowa and was told my balance was zero even though I have never used it. Now I received another card from the same company for the same amount, $15.00. I called the number on the back of the card again and was told that I did activate my new card. I am scared to use my new card fearing the same outcome as the first one. I gave my card number for the first one [protected], expiation date 10/21, and code on the back, 430 but was told my balance was zero, even though I had never used it. I then went to your web page but was told the expiration date was invalid. My second card number is [protected], expiration date 02/22 and code on the back is 641. Thank you, robert hernandez