Catchup now showing when "Watch Now".

In the the 2 weeks, I have lost catchup facility (it shows "watch now" but it jumps out again without showing anything) from my dstv Explorer decoder. You speak to a consultant on the chat; Kamogelo, they are not helpful at all and tell me that my signal suddenly is not good enough... this is what is has been right from the beginning and I do not have issues with anything else watching from the decoder. My signal strength and quality is 72% and and 70%.