Now I'm almost bereft of cash, and will have to borrow money from my employer to see me through until my next payday, which will be on the 15th of March.

Aside from your pension-relared problems, you should never have allowed yourself to get in the situation of being skint with more than two weeks to go till your next payday!
As for your pension probs, keep on their backs via frequent e-msils. Lazy penpushers like that will do what they are paid to do in the end. Civil servants should never forget that's exactly what they are - servants of the people.