Good to read about your council's and local volunteers' plans to help refugees, G23.
There is no shame in not easily understanding speech that's very different in pronunciation from what you're used to. A lot of even home grown accents are very broad, vowel sounds are differnet, glottal stops more frequent than one's used to, etc. I often don't understand my own daughter and have to ask her to repeat what she has said. She sometimes speaks with the local Scottish accent (consonants dropped all over the place, vowels different from what we say at home, more elision of words, etc). If she slows down and articulates I can understand but at full speed, no chance. Just saying.