Help to program garden line timmer?

Hi need help to program the gardenline timer.
Follow we’d all the instructions the first time the timer worked but not the 4th day that I programmed it it didn’t turn on please let me know what do I do about it, need help ASAP going on holiday , purchased the gardenline timer Ref number 54372 from Aldi store appreciate you help

Mrs Mona Asrawe
May 2018