Declined Foreign Transaction

Im so done with FNB, I have changed my cards multiple times due to this declined foreign transactions and now with my new card, within the past 6 days I have had 7 transactions been decline and the R8.50 being deducted from my account. I am a student and I cannot afford to continue to pay these fees on deductions that I have not incurred. I do not understand why FNB continues to let this happen. Completely done with FNB, I have been a loyal customer for many years but due this issue that continues to not be resolved, they will no longer have my money nor my business.