Bad service

I bought a phone last year 31/01/2020 from the Tokai branch and had endless problems wiyh the phone. The phone became problematic in March and the phone had to go for repairs which was 21 days went to go fetch the phone and the very next day the same issue occurred and took the phone back gor another 21 day which turned out more that 21 day 'covid time now'.Eventually i get the phone and we sorted again just for another few months. Now January come the phone again problematic and I take it in for repairs again only to be told that in 4 days the guarantee expires and the phone will be fixed again and i wont be able to get it fixed again or get a other phone if it becomes a problem again. What makes me angry is the fact that being a single unemployed mother I bought this phone for my 16 year old autistic son who is mostly in to music and yes he do also use whatapp and now his world is upside down because that was his calm. Sitting listening to his music was everything to him and Im ever so sorry I ever bought a phone by Cash Crusaders. You lost a customer because of your bad service you provide.