Bad services

I had such good service with one plan until recently they made a mistake on my account and granted me a payment break when I did not request it instead of not debiting my account end of May they done it in April and I was not aware of this. Keeping in mind i lost my job and had no money to pay May that's why i asked for the break then. Now a skipped my payment end of June because they took the money in was gona pay end of June in May still not aware what happened until i logged in my account. Now i am to blame but i had money in April to pay this account i am so frustrated and feel that this is there fault and not mine at all.