Massive inconvenience

There food is absolutely lovely but the system needs to be checked. I bought food twice over the weekend at KFC and today they charged me the exact same amount, with the exact same reference again. Phoned KFC twice and emailed them, but no one can give me a definite answer on how long this process will take. Gave my contact details too and I am still waiting.

Doubt it should take so long to investigate if I sent my bank statement and it clearly shows on there that there's been 2 duplicate transactions