Poor poor service

After my last time reporting rain they were quick to jump and assist and telling me everything will be fine I must pay the outstanding amount then I can change my payment date ....I paid it and now it's a new excuse and the ******** people working for rain that answers the call after a half and hour telling you they can't do nothing and even if they report it to their manager the manager will tell me the same thing ....I'm really frustrate it's going for 8 months now that I'm struggling to change my billing date this is really ridiculous and unacceptable