Spuddles I'm sorry you have had a hard time with questionable test results.

I don't think that it was my comments that you were seconding because in this recent thread HERE I posted this:

I had no problems with the Fortel Ultra.

Had a weak +ve at 12 dpo and every day after that it got stronger till I went to the Drs and had my PG confirmed.
It's good to hear that you had such a quick reply to your question from the managing director.
All the best for your TTC journey and I hope it is not too long before you have an accurate positive test