Card repllacent drama

SO UPSET!!! Got SMS from Donna Claire to change my card. 1st battle every week @ their Greenacers branch to get in exchanged because their telephone lines forever faulty. Then yesterday my new card get denied because according to their HQ I did not answer security questions correct, but none of that mattered when they phoned me 30/3/15 to sell me life cover on the very same account. Then all my detail was correct. Today they tell me their forensics don't answer their phone and they work skeleton staff so maybe on Tuesday I will get feedback. Tries to phone number in HQ al day long and it just say not available! Is this how you treat your customers