Gazzzzzzzzzz Allcott

I am in same boat, submitted on 6th April got told going through security checks, passed security check and was told by letter that my rebate had been recalculated and they was paying that amount in 10 days only for me to fone up on the 11th day to be told my checked rebate was being security checked by security checks , my new date now is 23rd September, I've never heard anything like it,, my security checked payment is now being security checked,